 This article is about a rider in Kamen Rider Build.
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Nariaki Utsumi (内海 成彰, Utsumi Nariaki) is the former assistant of Gentoku Himuro at the Touto Institute of Advanced Matter Physics. He is a devoted member of the Namba Children and worked with Faust. After Gentoku's identity as a member of Faust was nearly blown, Nariaki acted as the decoy Night Rogue (ナイトローグ, Naito Rōgu) during Touto's raid into Faust and was gunned down by Gentoku, presumed dead in the aftermath of the attack. He was however saved by Evolto and converted into a cyborg in order to save his life.
In his newfound state, he began upgrading the Kaiser System and test transformed into Hell Bro's (ヘルブロス, Heru Burosu), before passing them on to Fu and Rai Washio. Shortly after, Evolto gave him a Evol-Driver, allowing him to transform into Kamen Rider MadRogue (仮面ライダーマッドローグ, Kamen Raidā MaddoRōgu)[1]. At that point, Nariaki served Evolto, but he eventually revealed that to be a ruse all to avenge Nanba.
History
Utsumi is first seen reporting to Gentoku about Sento's application for a job at the Touto Institute of Advanced Matter Physics, noting that Sento had passed the entrance test with a perfect score.
Utsumi is Sento's direct superior at the Institute, reporting directly to the Prime Minister of Touto, Taizan Himuro, while at the same time also secretly assisting Gentoku/Night Rogue within Faust. He was one of the first present witnessing Taizan's collapse after the Pandora Box was stolen from the Institute. The Box was later hidden within a secret basement at one of Namba Heavy Industries' laboratories.
Faust's Pandora Box Plan
Shortly after the emergence of a second Kamen Rider, Utsumi was called upon by Juzaburo Namba for a favor. Later, as he watched Sento return to work despite it being a day off for all lab staff, Utsumi decided to reveal the location of the Box's hidden location to Sento. Though the Box ended up being reclaimed by Blood Stalk, and Utsumi was eventually forced to cooperate with Namba in his plan: to assume the identity of Night Rogue as a decoy in a staged operation by Touto to supposedly take down Faust. Due to Build's intervention, Utsumi was seemingly exposed as Faust's creator, though Build suspected that something was amiss.
Utsumi just before his "death".
Chased by Build to a bridge above a river, Utsumi, at his wits' end, confessed his inner troubles as a scientist. Revealing that he already knew that Build was Sento for a long time already, Utsumi urged Sento to not land into the same fate as his, and warned him to 'turn back' when he still have the time before he was shot in the shoulder by Gentoku, causing Utsumi to fall into the river below to his apparent demise.
Return
Utsumi at Namba Heavy Industries.
- "It's been a while...Himuro."
- ―Utsumi's first words upon meeting a former superior[src]
However, he barely survived the fall and was pulled out of the river by Blood Stalk, and later on, turned into a cyborg before being placed in the science division of Namba Heavy Industries. On the night of Kamen Rider Grease's arrival, Gentoku Himuro arrived at the Industries, waiting to talk to Juzaburo Namba until Utsumi approached him. [The Golden Soldier]
Utsumi was approached by Gentoku, who had been banished from Touto on his father's orders. Utsumi accepted Gentoku's request to be made into a Kamen Rider but not before taking pleasure in making him swallow his pride and beg for it. [A Man Called Rogue]
On Stalk's orders, Utsumi went to nascita where Sento Kiryu was surprised to see him alive as well as being able to make vastly superior coffee to Soichi Isurugi. Taking him underground, Utsumi revealed his intent to continue Sento's training to master the new Fullbottles left to him by Stalk in preparation for his deciding match against Kamen Rider Grease. Though Sento performed efficiently against simulated Smash Hazards with basic Best Matches, Utsumi pointed out that he would have to use the Hazard Trigger to defeat Grease. Sento understood this and had already designed blueprints for a device that would cancel his transformation if he went berserk. But it needed data of his Hazard Form's performance to complete it, to which Utsumi obliged by transforming into Night Rogue once more, using his self-made Transteam Gun from Gentoku's Blueprint. Though he overwhelmed by SmaphoWolf Hazard as Build went berserk, Utsumi was able to complete the dangerous procedure by using holographic Smashes to distract the rampaging Build, allowing him to forcefully pull out the Hazard Trigger and cancel Sento's transformation. With the data he needed to be collected, Sento was called away to intercept an attack on a Fullbottle facility. [First Chapter]
Working on behalf of Namba, Utsumi updated the Kaiser System originally developed by the late Kaisei Mogami to create Remocon and Engine Bro's, which would be used by soldiers of Seito, Namba's preferred choice to inherit Japan. Utsumi was given the personal thanks of Seito's Prime Minister Masakuni Mido. [The Phantom of the West]
Teaming Up With Evolto
As Evolto reaches the final phase of his plan (Phase 4/Black Hole), he openly declares to Namba that he'll now rule the world. Knowing this, Utsumi prepares for all-out war against Evolto, such as injecting Nebula Gas into the Washio brothers and even contacting his former boss to temporarily make an alliance.
However, Evolto was too strong to handle, even when Build, Rogue, Cross-Z and Remocon Bros teamed up. After Fu and Rai Washio, and Namba himself are killed, Evolto gives his last chance to Utsumi, making him choose whether he would fight to avenge Namba or fight for him.
Utsumi goes insane and preparing to break his benefactor's walking cane.
At this point, Utsumi finally goes insane. He renounced his connection with Namba by breaking his benefactor's walking cane and joining Evolto who, in return, gave Utsumi the second Evol Driver. Using the Bat and Engine Fullbottles, he became a Kamen Rider, whom Evolto christened as MadRogue.[Mad World]
Acting on behalf of Evolto, Utsumi appeared before Gentoku and Kazumi, who had been held in captivity by the Blood Tribe. Utsumi returned their Sclash Drivers, allowing them to transform and escape, but not before making them grovel for his assistance. [Kamen Rider Build: Be The One]
Death
During Team Build's final battle against Evolto, Utsumi appears before Gentoku after he faced the clones of Engine and Remocon Bros. Transforming into MadRogue, Utsumi unexpectedly attacks Engine and Remocon Bros, showing his ruse against Evolto. Gentoku claims that he's indeed 'mad' and Utsumi calmly said that he's still a Namba Children at heart. They then form an alliance against Hell Bros.
Sawa later arrives with Pandora Box and gives MadRogue the Shark and Bike Fullbottles. MadRogue states that he implants a weakness against the clones, and using the Shark and Bike Fullbottles can neutralize their attacks, which they used to defeat the Hell Bros clone. However, Evol Cobra then arrives to collect the Purified Hammer Lost Fullbottle that he inject earlier to the Hell Bros clone.
Evol easily defeats both Rogues, until MadRogue activates the data he had collected from Evolto's Evol-Driver, dubbing them as 'Phases'. MadRogue then attacks Evol with super speed after he activates Phase 3, thus giving Evol a Hard time. But, after activating Phase 4, MadRogue stops all of sudden and receives a direct hit from Evol's punch, canceling his transformation.
Evol then explained that Utsumi could handle Evol's power since Utsumi wasn't totally human anymore. After Gentoku had shot him, Evolto turned him into a cyborg. Apparently, Phase 4 overloaded Utsumi's systems, hence why he suddenly stops. Evol then was about to kill both Gentoku and Sawa to obtain the Hammer Lost Fullbottle, but Utsumi manages to shield Evol's Steam Blade with his body, thus deactivating him as Evol throws Utsumi’s corpse away. Gentoku then successfully flees with Sawa, saving the Lost Fullbottle. His last words before dying implied that he was yet intended to save the world as he said "All for Namba" [Zero Degree Flames]
New World
Utsumi, working at the Namba Machine Workshop.
After Sento defeats Evolto for good, the new world had been successfully created. This world’s version of Utsumi is working at the Namba Machine Workshop and is shown making steel rebar. For some reason, Utsumi deems that the rebar is not up to standard and intends to break it using his knees, which he failed. [The Tomorrow Build Will Create]
As Utsumi originally used the Evol-Driver and was thus not injected with Nebula Gas, his memories from the original World of Build were not restored when Killbas used Ryuga Banjo to restore the Pandora Box using the white-colored Pandora Panel, despite his undying faith and loyalty for his boss Namba. Utsumi was seen in the Namba Machine Workshop, having finished working on his product, a steel walking cane known as the "Namba Stick" after countless failures. However, he breaks the cane after slamming it onto his knee, much to his shock. [Kamen Rider Build NEW WORLD: Kamen Rider Cross-Z]
- "Everything...is for Namba Heavy Industries...no, it's for the people. "
- ―MadRogue's one time catchphrase during his fight against Down Fall.[src]
For some reasons, Utsumi regains fragments of his memories from the old world and he sought and asked Sento to douse him with Nebula Gas in order to regain all of his original world's memories. Due to Down Fall attacking Warehouse 3 and Sawatari Farm looking for the White Pandora Panel and Hazard Trigger, Utsumi was left soaked in the White Panel Nebula Chamber for a long period of time, only opened after Sento finally remembered him. Sento then gave him an EvolDriver based on the original, but was modified for human use, which Utsumi later used to transform into MadRogue and helped his fellow riders in fighting against Down Fall. After Keiji Uraga's death, Utsumi, expressing his disdain for him being a cyborg in the old world, comically tries to break the Namba Stick cane again using his knees but ultimately fails, yet is amazed at its strength.[Kamen Rider Build NEW WORLD: Kamen Rider Grease]
Personality
Throughout the series, Utsumi is shown to be very loyal to who he is working with, though it's later revealed that his true loyalty had always aligned with Namba Heavy Industries Ltd., as part of the Nanba Children. His affiliation with Gentoku is due to this as well since Gentoku was working for Namba at the time. Despite his absolute loyalty to Namba, Utsumi expressed interest in living a normal life as a normal scientist, though he felt it that dream was shattered the moment Gentoku shot him and Evolto turned him into a cyborg. Not wanting anyone to go through the same thing he went, he warned Sento not to follow the same path as him. In time, his cybernetic regeneration would develop a very maniacal and ruthless personality, as demonstrated when he forced Gentoku to kneel and stepped on his hand, resulting in sadistic laughter as he took his revenge for Gentoku's failed attempt to kill him. After Namba's death, his insanity took on a whole new level as he was even willing to pledge allegiance to Evolto in order to avenge Namba, and outright lashed out at Gentoku for turning him this way. However his allegiance to Evolto was actually false and only did so just to get close to Evolto and avenge Namba. This proves that Utsumi is a proficient liar and mastermind, and he is indeed as "Mad" as he looks.
During his tenure as Kamen Rider MadRogue, Utsumi became unnerved by deaths close to him and went overboard in his ambitions of creating his Namba Empire with the power of the Pandora Tower. However, Utsumi has no qualms resorting to underhanded methods himself, such has hostage taking and blackmail. Utsumi is also described to be a coward, but his ego is quickly inflated the moment he gains an upper hand. Utsumi was completely terrified when Gentoku attempted to rebel, but quickly regained his confidence after Gentoku was immobilized by his killswitch and violently attacked the unarmed Gentoku.
Upon his revival in the New World, Utsumi seemed to have retained the fragments of his memories and his habits from the old world, such as attempting to break metal canes. With Sento's help, he is able to fully regain his memories and he is not hesitant to fight alongside the Riders against Down Fall.
Powers and Abilities
- Genius-Level Intellect: Since Utsumi had worked for the Touto Institute, he possessed a certain level of intellect and this allows him to elevate to the rank of Gentoku's assistant. Because of this, Gentoku had speculated that Utsumi had a hand in the creation of Hokuto's Sclash Driver for Kamen Rider Grease, something which Sento Kiryu also suspected; this is later confirmed after Seito invades Hokuto, when it is revealed that Utsumi has built and upgraded another Sclash Driver for use by Kamen Rider Rogue, as well as duplicating Kaisei Mogami's Nebulasteam Gun for use by the Hell Bro's, all as part of Namba Heavy Industry's partnership with Seito. Utsumi also has access to data on some of Build's forms, including the Hazard and RabbitRabbit Forms, using them to Namba's advantage.
- Cyborg Physiology (Formerly): In order to save his life after he was shot by Gentoku and fell off the bridge, Utsumi was turned into a cyborg by Namba Industries. The extent of the abilities this grants him is unknown, but it may be what makes him able to emulate Evol's Phases. However, attempting to use Phase 4 caused him to overload. It may also be possible that Utsumi's cyborg nature is what allows him to use an Evol-Driver. After he was revived in the new world, even when his memories from the old world returned, his cyborg traits seem to not been carried over, which makes him return to being a human.
- High Hazard Level Physiology: It is implied by his use of the Transteam Gun that Utsumi has a high Hazard Level. He later uses the Evol-Driver, which usually requires a minimum Hazard Level of 5, which no ordinary human can accomplish. While possessing Utsumi's body, Evolto states that he had modified Utsumi's Evol-Driver for human use. This may mean that either Utsumi's Hazard Level was artificially enhanced, or his Evol-Driver required a lower Hazard Level. This reason can also be used when Sento creates a new Evol-Driver for him to use during their fight against Down Fall.
Forms
Night Rogue
Night Rogue analyzing Build's SmaphoWolf Hazard Form.
- "Bat! Mistmatch! Bat...Ba-Bat... Fire!"
- ―Transformation announcement[src]
- Height: 197.5 cm.
- Weight: 103.0 kg.
Ability Perimeters:
- Punching power: 17.2 t.
- Kicking power: 20.5 t.
- Maximum jump height: 49.0 m.
- Maximum running speed: 100 m. per 4.1 sec.
Like Blood Stalk, Night Rogue's form is accessed with the Transteam Gun and the Bat Fullbottle.
Unlike Build, Night Rogue's Ability Perimeters are not spread out between his arms and legs. While Night Rogue gets power from only one Fullbottle, he's much stronger than Build's Trial Forms and his stats even surpass some of Build's Best Matches.
Utsumi's transformation into Night Rogue allows him to last for a good while against Build's Hazard Forms, at most before Build starts losing control. Utsumi, as Night Rogue, can also use his visor to analyze Build's stats.
Utsumi originally transformed into Night Rogue to act as Gentoku's decoy in order to keep his identity a secret. Later, he would use this form several more times in order to collect data on Sento while Gentoku was being experimented on in order to become Kamen Rider Rogue.
Night Rogue consists of the following parts:
- Night Rogue Head (ナイトローグヘッド, Naito Rōgu Heddo): Night Rogue's helmet.
- Central Chimney (セントラルチムニー, Sentoraru Chimunī): A chimney unit mounted on Night Rogue's head. It has a heat removal function, a function to disperse toxic gas, and can also launch special bullets.
- NR Signal (NRシグナル, NR Shigunaru): Data collection system in Night Rogue's helmet. It collects data in real-time and performs emergency repair on damaged parts of the suit. It also manages the condition of the body.
- Bat Night Goggles (バットナイトゴーグル, Batto Naito Gōguru): Transparent goggles to protect Night Rogue's face. The built-in ultrasonic sensor allows him to fight in complete darkness.
- Night Seeker Eye (ナイトシーカーアイ, Naito Shīkā Ai): Night Rogue's eyes. It has a built-in night vision sensor and can detect heat sources and movement.
- Air Face Duct (エアフェイスダクト, Ea Feisu Dakuto): A built-in gas mask in the helmet. It removes harmful substances from the air when breathing and can discharge toxic gases.
- NR Face Guard (NRフェイスガード, NR Feisu Gādo): Device that protects Night Rogue's head. In response to an enemy's physical attack, it emits a wave that cancels out the impact to nullify the damage.
- Bat Chest Armor (バットチェストアーマー, Batto Chesuto Āmā): Night Rogue's chest armor. The chest is equipped with a device called Steam Generator (スチームジェネレーター, Suchīmu Jenerētā) that increases user's fighting ability. It can also accelerate the user's movement speed and attack power.
- NR Unlimited Suit (NRアンリミテッドスーツ, NR Anrimiteddo Sūtsu): Shock resistant bodysuit of Night Rogue. It can release the physical limiter and unleash the hidden physical ability of the user while offering protection from damage.
- NR Steam Shoulder (NRスチームショルダー, NR Suchīmu Shorudā): Night Rogue's shoulder armor. They optimize arm movement to improve attack accuracy. The steam pipes can also spray toxic gases while exhausting heat.
- Dark Rush Arm (ダークラッシュアーム, Dāku Rasshu Āmu): Night Rogue's arms. They increase speed and power, and can also use the attached Darkness Winger (ダークネスウィンガー, Dākunesu U~ingā) blades to slash enemies.
- NR Bat Glove (NRバットグローブ, NR Batto Gurōbu): Night Rogue's gloves. They are reinforced and have sharp claws at the fingers to allow for slashing attacks.
- Metal Knee Bat (メタルニーバット, Metaru Nī Batto): Night Rogue's knee pads. They optimize leg movement to improve speed.
- Dark Rush Leg (ダークラッシュレッグ, Dāku Rasshu Reggu): Night Rogue's legs. They combine power and speed and specialize in high powered knees and continuous kicks.
- Night Seeker Shoes (ナイトシーカーシューズ, Naito Shīkā Shūzu): Night Rogue's shoes. They suppress sound for stealth attacks and can emit special steam for a kick attack.
Appearances: Build Episode 12, Raising the Hazard Level ~7 Best Matches~ ("First Chapter", "Final Chapter")
Hell Bro's
- "Gear Engine! Gear Remocon! Funky Match! Fever! (Rhythmic beeping, engine revving) Perfect!"
- ―Transformation announcement[src]
Statistics
- Height: 202.0 cm.
- Weight: 108.0 kg.
Ability Perimeters:
- Punching Power: 41.6 t.
- Kicking Power: 50.6 t.
- Maximum Jump Height: 64.8 m.
- Maximum Running Speed: 100 m. per 1.4 sec.
Hell Bro's is the fusion of the Kaisers Engine Bro's and Remocon Bro's, transformed into by inserting the Gear Engine or Gear Remocon into the Nebulasteam Gun, then removing it and inserting the other.
This form is exclusive to Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Next Chapter.
Kamen Rider MadRogue
- "Koumori! Hatsudouki! Evol Match! Are you ready? BatEngine! Fuhahahaha!"
- ―Transformation announcement[src]
Statistics
- Height: 196.0 cm.
- Weight: 105.8 kg.
Ability Perimeters:
- Punching Power: 43.5 t.
- Kicking Power: 50.8 t.
- Maximum Jump Height: 73.3 m.
- Maximum Running Speed: 100 m. per 1.3 sec.
Utsumi transforms into Kamen Rider MadRogue by inserting the Bat and Engine Fullbottles into the Evol-Driver and turning the lever.
As MadRogue, Utsumi has higher punching and kicking power than Build's Rabbit Rabbit Form while also having a slightly lower running speed and jump height than its base perimeters. He is able to overwhelm Rogue and Grease in every area but is also easily outclassed by all of Evol's forms and Cross-Z Magma.
MadRogue's wings
After inputting Evol's data into his Driver, Utsumi was able to mimic his abilities up to Phase 3. In Phase 3 he demonstrated Evol's super-speed and energy covered punches, which allowed him to fight on par with Evol himself. Utsumi also attempted to use Phase 4, but his cybernetics overloaded before he was able to do so.
MadRogue wields the Nebulasteam Gun and Transteam Gun as his personal weapons and the Steam Blade as his sidearm. He is also able to wield any of Build's weapons if he inserts the corresponding Fullbottle into the Evol-Driver along with the Rider Evolbottle.
Kamen Rider MadRogue consists of the following parts:
- MadRogue Head (マッドローグヘッド, Maddorōgu Heddo): MadRogue's helmet.
- Cybat Armor (サイバットアーマー, Saibatto Āmā): Armored parts of MadRogue's head. It is explosion-proof, and will shield the user from explosions from the engines built into the armor.
- MR Signal (MRシグナル, MR shigunaru): Data collection system in MadRogue's helmet. It collects data in real-time, and performs emergency repair on damaged parts of the suit. It also manages the condition of the body. It can be fine-tuned by tracing the signal up and down.
- Metal Bat Blade (メタルバットブレード, Metaru Batto Burēdo): The bat-like crest on the helmet. It can establish a link with Hard Guardian and Clone Smash units to command them.
- Mad Seeker Eye (マッドシーカーアイ, Maddo Shīkā Ai): MadRogue's eyes. It has a built-in night vision sensor and can detect heat sources and movement. The built in ultrasonic sensor allows him to fight in complete darkness.
- Air Face Duct (エアフェイスダクト, Ea Feisu Dakuto): A built-in gas mask in the helmet. It removes harmful substances from the air when breathing and can discharge toxic gases.
- MR Face Guard (MRフェイスガード, MR Feisu Gādo): A device that protects Kamen Rider MadRogue's head. In response to an enemy's physical attack, it emits a wave that cancels out the impact to nullify the damage.
- Cybat Armor (サイバットアーマー, Saibatto Āmā): The purple and white armor on MadRogue. It is explosion-proof, and will shield the user from explosions from the engines built into the armor. The chest is equipped with a device called MR Steam Generator (MRスチームジェネレーター, MR Suchīmu Jenerētā) that increases user's speed. The user can also deploy the Mad Night Flyer (マッドナイトフライヤー, Maddo Naito Furaiyā) to fly.
- MR Unlimited Suit (MRアンリミテッドスーツ, MR Anrimiteddo Sūtsu): Shock resistant bodysuit of Kamen Rider MadRogue. It can release the physical limiter and unleash the hidden physical ability of the user while offering protection from damage. In addition, the special liquid that fills the inside of the suit can enhance the affinity between the special micro-body Mech Virus (メックヴァイラス, Mekku Vu~airasu)} and the user.
- Bad Steam Shoulder (バッドスチームショルダー, Baddo Suchīmu Shorudā): MadRogue's shoulder armor. They maintain and manage the operating state of the internal combustion engine incorporated in each part of the suit by removing excess heat. They can also spray toxic gas using the components of the Fullbottle, develop a smoke screen, and launch special bullets.
- High Burst Rush Arm (ハイバーストラッシュアーム, Hai Bāsuto Rasshu Āmu): MadRogue's arms. The built-in engine and drive unit which are fueled by the components of the Fullbottles significantly increase the strength and speed of movement in the arms.
- Night Raid Edge (ナイトレイドエッジ, Naito Reido Ejji): The blades on MadRogue's arms. The sharpness of the blade increases the darker the area is. A blow in complete darkness is instantly fatal.
- Mad Vengeance Glove (マッドヴェンジェンスグローブ, Maddo Vu~enjensu Gurōbu): MadRogue's gloves. They are reinforced, and have sharp claws at the fingers to allow for slashing attacks. The power of the attacks increases the more the user hate the enemy.
- High Burst Rush Leg (ハイバーストラッシュレッグ, Hai Bāsuto Rasshu Reggu): MadRogue's legs. The built-in engine and drive unit which are fueled by the components of the Fullbottles significantly increase the strength and speed of movement in the legs.
- Mad Vengeance Shoes (マッドヴェンジェンスシューズ, Maddo Vu~enjensu Shūzu): MadRogue's shoes. They are reinforced, and have a sharp claw at the sole that can inject a powerful neurotoxin. The power of the attacks increases the more the user hate the enemy.
This form has two finisher:
- Evol Driver Finishers:
- Evoltic Attack (エボルテックアタック, Eborutekku Atakku): This finisher has six variations:
- MadRogue flies into the air with the Mad Night Flyers and rams into the enemy.
- MadRouge leaps into the air and sprouts the Mad Night Flyers before delivering a flying dropkick to the enemy.
- MadRogue performs a low kick covered in purple energy to an enemy on the ground.
- MadRogue fires a steam projectile covered in purple energy from the Nebulasteam Rifle.
- MadRogues unleashes two energy slashes from the Steam Blade that travel through the air and follows them up with sustained fire from the Nebulasteam Gun.
- After replacing the Engine Fullbottle with the Bike Fullbotle and initiating the Evoltic Attack, MadRogue summons the Machine Builder, which redirects the enemy's attacks by binding them to it's front wheel before ramming into the enemy.
- Evoltic Attack (エボルテックアタック, Eborutekku Atakku): This finisher has six variations:
- Evol Driver + Kaizoku Hassyar Finisher:
- Pirate Finish/Kaizoku Densya: MadRogue inserts the Kaizoku Fullbottle and Rider System EvolBottle into the Evol Driver and turns the crank, summoning the Kaizoku Hassyar. He then charges the weapon by pulling the arrow and holds it for a period of time before letting it go. The weapon then fires a green and azure energy train that rams into the enemy several times.
Appearances: Build Episodes 38-40, 42, 44-45, 47, Kamen Rider Build NEW WORLD: Kamen Rider Grease
Equipment
Devices
- Transteam Gun - Night Rogue's transformation device and personal weapon
- Fullbottles - Night Rogue and MadRogue's transformation trinkets
- Nebulasteam Gun - Hell Bro's transformation device and MadRogue's personal weapon
- Gears - Hell Bro's transformation trinkets
- Evol-Driver - MadRogue's transformation device
Weapons
- Steam Blade - Standard sidearm weapon. Can combine with the Transteam Gun to form the Steam Rifle or the Nebulasteam Gun to form the Nebulasteam Rifle.
- Kaizoku Hassyar - MadRogue's weapon granted by the Kaizoku Fullbottle.
Other
- Tablet: While working under Faust, and by extension Namba, Utsumi is in possession of a tablet that allows him to create holographic Smash. The Smash holograms created by this device emit electric pulses upon contact, making them more realistic, hence they are suited for combat simulations. [Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: First Chapter]
Ridewatch
- "(Digital beeping) MadRogue!"
- ―Activation announcement[src]
- "The bat rider with the feeling of revenge is...MadRogue! (復讐の思いを秘めた蝙蝠ライダーは...マッドローグだ！, Fukushū no omoi o himeta koumori Raidā wa... MaddoRōgu da!)"
- ―Secondary activation announcement[src]
- "(Right-hand Ridewatch's announcement)! Armor Time! (Evol-Driver Trial Form orchestra with post lever-crank noise) Evol-Match! MadRogue!"
- ―Transformation announcement in the Ziku-Driver's left-hand slot[src]
- "Finish Time! Evoltic Time (Break/Burst)!"
- ―Finisher announcement in left-hand slot[src]
MadRogue Ridewatch (マッドローグライドウォッチ, Maddo Rōgu Raidowotchi): Based on Kamen Rider MadRogue, this Ridewatch would provide access to the MadRogueArmor. It is dated 2017.
Relationships
Nanba Heavy Industries/Faust
- Juzaburo Namba: Utsumi shows to be very loyal to him, even after Evolto kills Namba.
Enemies/Team Build
- Sento Kiryu/Katsuragi Takumi: Both are scientists but were used by Gentoku to start the war. While working for Utsumi, Sento can't help but compares Utsumi stoic personality akin of a Cyborg, which ironically proven true by Evolto himself. In the New World, he later joins forces with Sento and Team Build against Down Fall.
- Ryuga Banjo: Utsumi saw Banjo as an enemy.
- Kazumi Sawatari: Had victimized his friends in Hokuto forcing him to give him the Pandora's Box in exchange for their freedom.
- Gentoku Himuro: Formerly his superior in Touto, Gentoku shot Utsumi as a way of covering his tracks. But he somehow returned and revealed that ever since he was saved by Evolto, he now working for Namba until his chairman's/president's death at Evolto's hands. Gentoku thought that he was responsible for Utsumi's dissension to madness as MadRogue. Although after Utsumi ruse was discovered, they become somewhat uneasy allies until Evolto kills Utsumi.
- Misora Isurugi: So far, Utsumi and Misora only met each other once, and not in a good light as Utsumi forcefully grabbed the completed Evol Driver from her, while she was distracted seeing her father as Blood Stalk.
- Sawa Takigawa: She and Utsumi were both Namba Children. But despite her joining Team Build permanently, he called Sawa by the phone letting her know of his plans in destroying Evolto from the inside, showing their somewhat mutual trust to each other.
Others
- Evolto: Served under him gaining the power to become Kamen Rider MadRogue, until revealing his plan to destroy him from the inside.
- Shinobu Katsuragi: Worked alongside him with Evolto until his true agenda was revealed.
Behind the Scenes
Portrayal
Nariaki Utsumi is portrayed by Yuki Ochi (越智友己, Ochi Yūki). As Night Rogue, his suit actor is Jun Watanabe (渡辺淳, Watanabe Jun). As Kamen Rider MadRogue, his suit actor is Yuji Nakata (中田 裕士, Nakata Yūji).
Meme
The ending scene in episode 38, where Utsumi snapped Namba's cane after feigning insanity has been made into a meme which involves parodying said scene into various situations. In the Japanese fandom, this is labelled under the Twitter hashtag Nariaki Utsumi Darn Collaboration Grand Prix (内海成彰クソコラグランプリ, Utsumi Nariaki Kuso Kora Guranpuri). Kouhei Takeda (Kazumi Sawatari) and Eiji Akaso (Ryuga Banjo) has also recreated this scene on Yukari Taki's (Sawa Takigawa's) Twitter page, and Instagram story.
Notes
Sento's depiction of "cyborg Utsumi".
- Utsumi's stoic personality for most of the series has led to a few occasions where Sento/Katsuragi jokes about Utsumi being a "cyborg" in the opening recap narrations of episodes 19 and 39. This is an ironic foreshadowing to episode 47 where it was revealed that he was actually turned into a cyborg.
- Like Night Rogue, MadRogue initially appears with a black undersuit which inexplicably changes to brown in later appearances.
MadRogue with a Snap Ride Builder
- In Kamen Rider Battle: Ganbarizing, MadRogue has a single purple Snap Ride Builder that appears around him when he transforms.
- MadRogue's pose and finisher for "Evoltech Attack" in episode 39 resembles Kiva's Darkness Moon Break & Emperor Moon Break.
- Similar to Akira Date, Go Shijima, Kiriya Kujo, and Shinobu Katsuragi; Utsumi feigned his betrayal to his allies and briefly aligned with the main villain's side, only to be revealed to be good in the end.
- However, in a twist compared to the other examples, Utsumi's feigned turn was instead followed with the revelation that he was still loyal to a different villain.
- MadRogue is the only Kamen Rider in series to not have any upgrade form, instead power-up in same form.
- Utsumi is the only rider to be a cyborg which is similar to the Showa era Kamen Riders who where turned into cyborgs by evil organisations.
- Utsumi's Rider form as MadRogue is the "Evol" anti-thesis to Build's BatEngine Best Match, since they both utilize the exact same Fullbottles, albeit differently. The Build Driver essentially materializes both properties and adorn Build with half-bodies, while the Evol-Driver combines both properties for a sinister new look.
Appearances
Kamen Rider Build
- Episode 1: That One with the Best Match
- Episode 2: The Innocent Runaway
- Episode 4: The Testimony Will Be Zero
- Episode 5: Dangerous Identity
- Episode 6: Moonsault of Anger
- Episode 7: The Devil's Scientist
- Episode 8: Memory Starts To Talk
- Episode 9: The Trap of Project Build
- Episode 10: Technology of Destruction
- Episode 11: Burning Dragon
- Episode 12: Theory of Conspiracy
- Episode 18: The Golden Soldier
- Episode 19: The Forbidden Item
- ROGUE
- Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~
- Episode 23: The Phantom of the West
- Episode 24: A Man Called Rogue
- Episode 27: The Counterattack Hero
- Episode 28: The Genius Arrives With a Tank
- Episode 29: The Opening Bell Rings
- Episode 30: The Truth of the Pandora Box
- Episode 32: Programmed Tragedy
- Episode 33: The Final Weapon: Evol
- Episode 34: The Severing Best Match
- Episode 35: Tower of Destruction
- Episode 36: Evolto Hunts the Stars
- Episode 37: The Ultimate Phase
- Episode 38: Mad World
- Episode 39: The Genius is Unstoppable
- Episode 40: The Final Revolution
- Episode 42: Legacy of Doubt
- Episode 43: Another Build
- Episode 44: The End of Evolto
- Episode 45: The Scientist of Hope
- Kamen Rider Build: Be The One
- Episode 46: An Oath to Be The One
- Episode 47: Zero Degree Flames
- Episode 49: The Tomorrow Build Will Create
- Kamen Rider Build NEW WORLD
- Kamen Rider Cross-Z
- Kamen Rider Grease