Wataru Kurenai

Wataru Kurenai (紅 渡) is Kamen Rider Kiva (仮面ライダーキバ). He is a shy young man who never lies, keeping to himself due to his hygiene obsession. He works at an atelier to continue his father's legacy of violin making with a dream to create the ultimate violin, using strange methods to accomplish it. But, Wataru is destined from birth to become the current Kamen Rider Kiva as his mother is Maya of the Checkmate Four, receiving a button with a diamond encrusted crown on it from her as a baby.

He teams up with Kivat to fight the Fangire race and protect humanity from them, only because the Bloody Rose orders him to "fight". But in time, Wataru learns of his family legacy and nature as a Fangire, as well as desiring to change into someone just like his father.

He later seemingly matured more by the time Decade's series started as he remained cool and calm throughout the series (although it should be noted that he still seemingly has his kind and caring side as shown in Wizard).

Evidently, Wataru is the one who inherited the mantle of Kiva from his mother, as his full-blooded predecessor was the previous King of the Checkmate Four who attempted to destroy humanity in 1986 with Otoya taking Kivat-Bat the 2nd and using it to take him down at the cost of his life. His name translates to "crimson going over" possibly a reference to his human and Fangire bloodline.

History
Left by Maya as a child to protect him from the retribution she would face, Wataru lived in the European-style manor that his father lived in. However, as the building has since said to be haunted, Wataru was referred to by his neighbors as Obaketaro (お化け太郎) for his strange appearance, later donning a mask and glasses as an adult to protect him from the "world's allergies" and using a notebook to express himself without talking. His only friend during his childhood was a boy named Taiga, who helped Wataru when he was bullied and mysteriously disappeared.

In 2008, while gathering fish bones in a third attempt to create the ultimate varnish for the ultimate violin like his father, Wataru comes across Megumi Aso, who manages to show him that his "allergies" are all in his head. He later saves her from the Horse Fangire as Kiva, countering her attempt to kill him soon after before leaving her stupefied and later saving her a second time from the Octopus Fangire.

During the events of Climax Deka, Wataru helped Ryotaro Nogami during his fight against Nega Den-O and the Nega Den-Liner.

When a female lawyer named Aya Natsukawa arrives to Wataru's home with a list of the various people that Otoya had victimized with his antics, Wataru is devastated to know a side of his father his mother never told him. After meeting Keisuke Nago and getting his advice, Wataru performs acts of moral obligation for his father's sins, until he learns that Natsukawa is the Moth Fangire and Otoya's most wounded victim. Unable to fight her, Kivat is forced to summon Garulu to supplant Wataru with his feral rage in Garulu Form so Kiva can kill the Fangire.

When Nago requests that Wataru keep an eye on Megumi in his stead, he meets a young man named Noboru, who is obsessed with Megumi himself. When Noboru reveals himself to be the Sheep Fangire, Wataru learns of Nago's hatred towards Kiva. Saddened but undaunted, Wataru manages to rescue Megumi when she is captured by the Sheep Fangire, destroying him in Basshaa Form. Since the incident, Wataru took to heart what Megumi learned from her mother: the same ideology Otoya follows: "All humans are music". Eventually, Wataru is forced to lose all of Nago's respect for him when he tries to protect the Frog Fangire, Takeo Ōmura. However, Wataru did learn from Ōmura that he needs to make a violin to call his own.

It was later that Wataru meets Kengo, whose rock and roll helps him in becoming more confident in himself. Though Wataru and Kengo have separate dreams, the two promise to help the other out so that both their dreams come true. Wataru ensures his part by protecting Kengo from the Rhinoceros Fangire, accessing Dogga Form. However, Wataru's world is turned upside again when he encounters the Lion Fangire Rook, whom he met when he was suffering amnesia. However by meeting Mami Kurasawa, a former student under his father (of which he is unaware), Wataru learns to cope with the recent Fangire events of who's evil and not by "listening to the voice in his heart."

After begrudgingly following Kengo to a fortune teller to find out who Kiva really is, Wataru loses consciousness. When he awakens, he is more confident in his abilities, but has a very sarcastic attitude. It is revealed that he is possessed, albeit unknowingly, by his father Otoya as a result of the fortune teller's ritual. While using Wataru's body, although unable to maintain possession at times, Otoya teaches Megumi how to overcome her fears of using the Ixa Knuckle and she is able to help Ixa defeat the Ladybug Fangire. When Otoya finally leaves, Wataru has no recollection on what has happened under the influence of his father's spirit.

Soon after this, at a mixer that Kengo set up, Nago has a waitress named Mio fired for accidentally spilling ice cream on his shirt. Feeling sorry for her, Wataru runs after her and finds out that they have a lot in common and they start dating with Megumi's help. However, when a berserk Grizzly Fangire tries to kill Mio, a rage awakens within Wataru that releases Tatsulot from Castle Doran who unleashes Kiva's full power, changing Kiva into his Emperor Form to mortally wound the Fangire. Before Mio took her leave, due to personal issues, Wataru promises Mio that he would get stronger for her. While the Fangire Hunters were being arrested, Wataru remembers Taiga and decides to help them out by him and Kengo joining the Fangire Hunters to battle the Crab Fangire until Nago altered history so that the Cicada Fangire's survival negated the Fangire Hunters' crisis. But in the aftermath of the fight against both Fangires, Nago learns that the button he gave to Maya ended up in Wataru's possession, explaining it to be an heirloom from his mother, setting up the events where Nago learns that Wataru is Kiva.

The fight's aftermath also caused a falling out between Wataru and Kengo when the latter's hand was injured to the point he could never play again and Wataru was trying to keep the truth from him out of not wanting him to worry. Later, Wataru is face to face with a fully grown Taiga, only to be devastated after learning that he and Mio are engaged. This stress, augmented by Kengo's return as the new Ixa user, causes the Bloody Rose to crack. Though he finishes repairing the violin, he realizes something is missing from the Bloody Rose. Then, Jiro appears to him, revealing to Wataru that his father's desires dwell within the violin. When ambushed by a Kukulkan while fighting the Horsefly Fangire, Kivat holds the monster at bay as Wataru plays the Bloody Rose, realizing his father's desires to protect all music. Infusing the violin with his own desire to find his own music, Kiva finally awakens into Flight Style to destroy the Kukulkan. However, this event causes the evoking of a weapon within Castle Doran, the Zanvat Sword of the previous King of the Checkmate Four.

Eventually, Jiro brings Wataru into Castle Doran to pull out the sword. When he discovers that he can't pull it out, he finds Mio running towards him until she is knocked out by the Rat Fangire. After destroying one, he is ambushed by two others before having to fight Kamen Rider Saga. Escaping, he finds Mio, who tells him that she loves him, not Taiga. Wataru becomes happy after this event, until he receives an invitation to Taiga and Mio's wedding. He then appears before Mio and Taiga, defending them from more Rat Fangires, while admitting his feelings to Mio. Found by Jiro, he tries to pull out the blade again, succeeding, though the Zanvat is created to limit the sword's power when it causes his Fangire blood to surface. After a brief fight with Saga, Wataru is exposed by Mio as she is revealed as the Pearlshell Fangire with Saga reverting to Taiga. Wataru runs off in confusion and hysterics before being spirited by Jiro who helps him cope with the revelations. The next day, as he and Mio discuss this, Taiga takes them to meet Maya as Wataru recognizes her. While demanding why she left him to fend for himself, Wataru learns that he is Taiga's younger half-brother.

Although confused as to why Maya never told him about any of this, Wataru slowly accepts his true identity. Wanting to share the truth, he informs Nago that he will tell everyone in the organization that he is Kiva. When Nago arranges a gathering at a restaurant, Wataru also reveals that he is half-Fangire, shocking everyone. Despite this, Shima falsely promises to help him build a world where both Fangires and humans can coexist peacefully.

Later, Wataru is approached by Taiga, who asks him to join the Fangires, and Mio, who asks him to destroy Taiga so he can be the new King. Wataru declines both of these requests, perplexed as to why both sides cannot get along. However, Taiga is persistent in getting his friend to understand his ideology that he asks the Bishop to awaken Wataru's true Fangire powers. This causes Wataru to go berserk and attack his friends, even to the extent of nearly killing Megumi. When he finally returns to normal, he becomes so traumatized from the ordeal that he completely relapses back into a recluse and completely isolates himself within his house, refusing to fight as Kiva anymore.

Though being convinced by Kengo and Nago, it took Maya's intervention to convince Wataru to fight as Kiva again, not as a human or a Fangire but as himself, so that he'll find his own music. Taiga, enraged by Wataru's decision, gives him time to reconsider. When Shima was near certain death, Taiga saved him by transplanting into him a bit of Fangire power. Wataru is appointed as Shima's bodyguard when this is revealed, as Nago was unable to bring himself to kill Shima. Shima then dies in combat with Taiga, enraging Wataru. They battle, and just as Kiva was about to finish Saga off, Mio steps in the way and takes the Emperor Moon Break as she is destroyed. However, finding her after the Bishop fatally wounds her, Wataru is left to think that he killed her and goes into despair with an equally distraught Taiga intent on killing him under the same impression.

But Jiro's interference allows Wataru to go back into 1986, meeting his father face to face just before he dons the mantle of Kiva. Though he originally came to keep his parents apart to negate his existence, Wataru learns that it would be pointless if Mio had never met him and the only way he could honor her is to live a strong life for her sake. He would ultimately play a pivotal role in the death of the original King before returning to 2008 after receiving his father's final words. With a stronger resolve, he charges into battle against the revived Fangires unleashed by the Bishop, saving Shizuka, Megumi, and Nago before confronting Taiga to settle things. In spire of interference, the fight ends with Wataru the winner though he refused to kill Taiga as he take his brother's place as the new King of the Fangires to everyone's shock. Taiga later demands Wataru to fight him again, having claimed to kill their mother to acquire the powers of Dark Kiva.

After their fight is interrupted by the Bishop and his new army of revived Fangires, the two Kivas and the Arms Monsters quickly defeat the Fangires, as the Bishop is destroyed by Nago as Rising Ixa. Wataru reveals that he had taken the mantle of the King for his brother's sake, shielding him from his enemies. By then, the revived Bat Fangire attacks the Kivas, defeating them easily. Wataru is thrown off of a cliff and encounters the spirit of his father near the discarded gauntlet of the original Ixa Prototype, telling Wataru that he lives on inside him and not to lose hope. With his father's encouraging words, both he and Taiga are able to defeat the Bat Fangire with a Snaking Death-Break and Emperor Moon Break combo. When Maya appears, Wataru is put at ease knowing that she was not really killed by Taiga as the two brothers are now on the same page and resume their fight to determine who will be the new King of the Checkmate Four.

Days later, just as he is about to play the violin at Nago and Megumi's wedding, a young man resembling Otoya bursts into the reception claiming to be Wataru's son Masao Kurenai from 22 years in the future. He warns his father of a new threat to humanity and shows him, Taiga, Nago, the Arms Monsters, and the rest of the reception a portal in the sky. In the end, Wataru, with his son as Kiva, Rising Ixa, Dark Kiva, and the Arms Monsters at his side, transforms into Emperor Form and confronts this new evil.

Kamen Rider Decade
Wataru's role in Kamen Rider Decade is mostly as an observer, along with Kamen Rider Blade's Kazuma Kenzaki. Wataru appears before Tsukasa Kadoya as a representative of the Kamen Riders, explaining to him that something is forcibly merging the parallel worlds of the Kamen Riders and causing their destruction. The Riders give Tsukasa the task of traveling the worlds and saving them as Kamen Rider Decade, while they prevent the destruction of Natsumi Hikari's world by freezing it in time. At the end of Decade's journey, however, Wataru reappears and told Tsukasa that his true mission was to defeat the Nine Heisei Kamen Riders, not befriend them. Wataru transforms into Kiva once more in order to fight Decade and end the crisis. In Movie War 2010, following Tsukasa's destruction, Wataru explains to Natsumi and Daiki Kaito that Decade had no story of his own, instead fulfilling whatever role the Rider worlds needed him to be, and that his death has undone the destruction of the multiverse.

OOO, Den-O, All Riders: Let's Go Kamen Riders
A mishap caused by the Greeed Ankh unintentionally altered the timeline which enabled Shocker to utilize the Core Medal to create the Shocker Greeed which defeated the Double Riders and seemingly erased the legacy of the Kamen Riders from history. In 2011, after Kamen Rider New Den-O's attempt to repair the damage, he along with Kamen Rider OOO and M-Ankh awaited execution. However, it was revealed the Double Riders had their brainwashing removed by a Shocker scientist.

The Double Riders joined with New Den-O and OOO to fight Shocker's forces, but were eventually defeated. When the order was given to kill everyone, V3 suddenly appeared, asserting that there were more than four riders. V3 was soon followed by all the other revived riders that came after him, including Kiva, as even though Rider history was changed, the people's memories haven't changed.

After the riders were united, they faced off against Shocker's Great Leader. Later, when joined by a force of extra riders, Kiva and all the other riders got on their motorcycles and performed the "All Rider Break", ramming into the Rock Great Leader and defeating it once and for all.

Super Hero Taisen
Kiva, among the majority of the Kamen Riders, was caught up in the "Super Hero Taisen" incident which resulted in the Kamen Riders and Super Sentai joining forces to defeat both Dai-Shocker and Dai-Zangyack. Kiva teamed up with Tsukasa (as Decade in 1 form) and later teamed up with the Go-Ongers using the Moonbreak finisher.

Kamen Rider Wizard
"I'm going to protect these kids!"

- Kiva Kiva appears with all the Heisei Riders from Kuuga to Fourze, led by Decade, in a special two-parter after the finale, The Kamen Rider Rings and Neverending Story.

Kamen Rider Taisen
Kiva joins the Heisei Riders in their war with the Showa Riders in Zawame City. At the climax, Kiva is one of the surviving Riders in the battle between Heisei and Showa. He is defeated by Kamen Rider #1's Rider Kick, transforming him into his Lockseed. Gaim is soon left as the last Rider standing before Ambassador Darkness of the Badan Empire reveals himself to be Ryo Murasame (Kamen Rider ZX). Together, they restore the other Riders and all 30 Kamen Riders defeat the Badan Empire.

Due to the timeline alteration caused by Shocker, Kiva became one of the brainwashed Riders in that timeline, donning the name of Shocker Rider Kiva.

Following the Rider Grand Prix in which Drive emerged victorious over Rider 3, who was promptly integrated into the Great Leader of Shocker's Rider Robo form, Kiva was among the Riders who attacked Drive while being caught in the crossfire as the Rider Robo joined the fray. Ultimately, the Double Riders 1 and 2 made their appearance having survived their apparent demise from within the Rider Robo, and broke Shocker's brainwashing on the fallen Riders, enabling all Riders to unite in a final battle against Shocker.

Unfortunately, Kiva was among the Riders whose existence was erased by the Rider Robo. This fate, however, was rendered moot when the Rider Robo was finally destroyed by, restoring Kiva's place in history.

Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm
Despite not appearing in the web-exclusive series, Kiva and 13 Heisei Riders were the projections of the Ganbarizing Critical Strike.

Kamen Rider Battride War
Kamen Rider Kiva appears as a Main Rider in the video game Kamen Rider: Battride War, which unites the riders of the Heisei era from Kuuga to Wizard.

Kamen Rider Battride War II
Kamen Rider Kiva reappeared in Kamen Rider: Battride War II, summoned by Cinema along with the remaining Heisei Riders in order to create the "ultimate movie". Kiva's stage was based of from Kamen Rider Kiva: King of the Castle in the Demon World, with Kamen Rider Arc as his main enemy.

Kamen Rider: Battride War Genesis
Kamen Rider Kiva reappeared in Kamen Rider: Battride War Genesis.

Novel
In the novel reimagination of the TV series, Kiva is Wataru's Fangire form. With that, Kivat, Basshaa and Dogga do not exist in this story. Meanwhile, Jiro/Garulu, who is in turn, a Fangire Hunter. And Nago never befriends Wataru, who ends up as the final villain. He died after his Rider Kick collides with Wataru's kick.

Personality
Wataru Kurenai was initially a shut in who's only friends were Kivat-bat the 3rd and Shizuka while being unpopular in the neighborhood for his strangeness. He was shyer as a child and a bit of a crybaby which lead to him being bullied by other children. Although at first glance Wataru seemed weak, he is actually quite tough as he managed to live on his own as a small child without any parents to take care of him. While he didn't live with his family as a child, Wataru deeply cares for the beings close to him such as Kivat-bat the 3rd, Maya, Otoya and Taiga and tries to help or protect them.

As Wataru meets more people, he slowly but steadily becomes more confident and learns to fight for others as Kiva rather than just doing so because the Bloody Rose tells him to. He also learned how to socialize more with others as he seemingly lost his unpopularity around his neighborhood when he faced them in a mature and calm way. Wataru also loves music (especially the violin) which he showed since around the start of his series.

Throughout his journey, Wataru also learned more about his heritage thus learning to accept the Fangires while also trying to make peace with them. Through a series of events including meeting and parting with his father, Wataru drastically matures and becomes a fully confident man. This maturity increases even more by the start of Decade's series as shown throughout the episodes he appears, though still not losing his kindness and friendliness as shown in Wizard.

Relationship

 * Family:
 * Otoya Kurenai: Wataru's father and a person he looked up into for becoming the violin maker. Wataru at first only knew him as a great person who loves to play violin and make it. But later learns about the bad things that his father has done. They later met after Wataru misunderstood of killing Mio (he used his Rider Kick as Kiva Emperor on her accidentally which later turned out that Bishop used the situation to kill the badly hurt Mio) officially in series (meet again in movie which is non-canon). Wataru later despise him during their initial encounter for his easy going nature but later respect him, especially when Otoya scolded Wataru that there is no way someone who he loves will be happy to know his death due altering past. Otoya's spirit will later support him again even in his death during the last fight against King. He was Kamen Rider Proto-ixa, and Later Kamen Rider Dark Kiva.
 * Maya: Wataru's mother. Wataru always questioned her disappearance for years because she left him when he is still a child. Maya is revealed to still love Wataru and later tell him that he left Wataru so he won't be involved in her case of being "traitor" among the Fangire (as the Pearlshell Fangire). It can be assumed that Wataru might become close again after Bat Fangire is killed and later revoked his title as King to protect Taiga.
 * Taiga Nobori: Wataru's half blood brother. Initially met when they are still child. Taiga considered Wataru as his best friend but later as enemy of love and brother that he has protect too when find out that Wataru is his brother. Wataru also almost feel the same when learning the truth about himself and Taiga but after many clashes they have through, they become a real close family. He was Kamen Rider Saga and later Kamen Rider Dark Kiva.
 * Masao Kurenai: Wataru's son from future, who became Kamen Rider Kiva.
 * Castle Doran residence:
 * Kiva-Bat the 3rd: Wataru's bodyguard and adopter for him. He always advise Wataru about to play outside and find friends.
 * Jiro: Wataru has no true close relationship of Jiro except the fact that Jiro is the most loyal bodyguard of Monster Arms among the two (Ramon and Riki once thinking about eating him). When Wataru is finally stuck about his father, Jiro always guide Wataru to trust his father.
 * Ramon: Serve as aid in fight mostly and guard Wataru alongside Jiro. Ramon somehow called Wataru as Onii-san despite Ramon is older.
 * Riki: Serve as aid in fight mostly and guard Wataru alongside Jiro.
 * Tatsulot: Wataru's bodyguard and aid to become Emperor or actually the "true" form of Kiva as mentioned by Tatsulot.
 * Kivat-Bat the 2nd: At first, his cautioned enemy. But later revealed that he is Kivat Bat the 3rd's father and help him to rescue his father and Maya.
 * Allies:
 * Shizuka Nomura: Wataru's best, childhood friend and can be assumed to be his future wife. Shizuka is revealed to have feelings toward Wataru as shown when she showed her devil side to break the relationship between Wataru with Mio initially (later reunite it).
 * Keisuke Nago: Wataru considers him as a mentor for facing life. Keisuke initially has a bad relationship with Wataru especially when Wataru becomes Kiva, which he considered as humanity's number 1 enemy. However, Keisuke becomes Wataru's best friend after Keisuke learns that Wataru is Kiva. He also apologize to Wataru for not noticing the fact that Wataru is Kiva and he attacked him for most of the time.
 * Megumi Aso: Wataru's ally. Megumi somehow treat Wataru as her own brother.
 * Kengo Eritate: Wataru's first best friend in his current year. Kengo adores Wataru because of his beauty music playing. There are times that Kengo had a fight with him but always reconcile in the end.
 * Mio Suzuki: Wataru fell in love on the first sight and later want to be her lover. However, the fact that she is the next Queen Fangire stuck Wataru in love triangle between him and Taiga which later becoming her death, much to make Wataru wish to disappear.
 * Mamoru Shima: Mamoru unaware the fact that Wataru is Kiva but let him do as he please. After Wataru was plotting to create the world where humans and Fangire can coexist, Mamoru becomes his enemy. But thanks to Taiga's hatred plan towards Mamoru which also canceled by Taiga (killing Mamoru when he turned into Fangire but canceled after curing him before died), Mamoru entrust Wataru to protect Taiga as the Fake King.

Fighting skills
Even though he is the son of Otoya and Maya, Wataru was initially not very good at fighting. While he has considerable strength, his kindness and lack of confidence prevented him from fighting to his fullest or even doing more than six push ups. Around the first part of the series, When Wataru wasn't Kiva, he was at one point bullied verbally and physically by a bunch of high schoolers who were younger then he was (until they were seemingly devoured by a Fangire) and even constantly by a bunch of middle aged people in the neighbourhood verbally without putting up a fight, making him appear weak and helpless. As Otoya shows when he possesses his son's body, however, Wataru actually has a lot of power and merely couldn't use it fully because of his lack of confidence. After gaining more confidence, Wataru as Kiva becomes strong enough to the point where he managed to defeat Sagarc with little difficulty.

This power was fully shown after defeating the Bat Fangire with his father, as he managed to drive away the revived Warthog Fangire without transforming into Kiva despite initially having trouble with him even in Emperor Form. This power may have increased more by Decade's series, as he seemingly managed to defeat the combined forces of Shocker combatmen, Orphonochs, Fangires and the Bat Fangire with help from Takumi. This is noteworthy as he was originally unable to defeat the Bat Fangire alone, even with or without help from Otoya or Taiga as Dark Kiva until being greatly motivated.

Forms
Kiva has multiple forms that provide him with different weapons and abilities, mostly all invoked by inserting Fuestles into Kivat's mouth. Kiva's motif is that of a vampire, with his final attacks inherited from Maya. However, unlike the Fangire King, Wataru's nature as a human-fangire hybrid initially left him unable to fully utilize Kiva's full power with the Catena (カテナ) Chains serving as restraints. His fighting power may also slightly depend on Kivat-bat the 3rd's condition as shown when Kivat caught a cold.

Wataru later on becomes able to use the full power of Kiva through Tatsulot and sheer willpower. Additionally, Zanbat serves as a restraint to keep the power of the Zanvat Sword from taking complete control of Wataru. It seems that his body later on becomes more adept to the power of Kiva as the series progresses to the point where Taiga hinted that he can now even use Dark Kiva itself. If this were the case, this may mean Wataru can currently transform into DoGaBaKi Form (as well as presumably DoGaBaKi Emperor Form) without suffering the drawbacks of its amount of demonic power.

Bloody Rose


A unique violin, the Bloody Rose (ブラッディ・ローズ) was created by Otoya and Maya as the "ultimate violin", later rumored to be a product of Otoya selling his soul to the devil himself, which is not entirely false, in a sense. The Bloody Rose only sounds whenever a violent Fangire is detected in the area, its music only heard by Kivat and Wataru, who hears it as a voice commanding him to "Fight", as it pinpoints the exact location the Fangire could be found. When played, the Bloody Rose can also disrupt a Fangire's activity. However, the Bloody Rose is sympathic to Wataru's mentality as it cracked when he fell into a deep depression. However, after repairing it, Wataru learns the Bloody Rose holds the desires of his father, placing in it his own desire which allowed him to assume Flight Style.

Devices

 * Kivat-bat the 3rd - Wataru's Kivat partner.
 * Demon Imperial Dragon Tatsulot - Wataru's second partner and the catalyst of allowing Kiva to assume Emperor Form.
 * Kivat Belt - Transformation device that forms when Kivat bites Wataru.
 * Fuestles - Whistle-like devices that activate a function, depending on the Fuestle.

Weapons

 * Demon-Beast Sword Garulu Saber - Kiva's form-changing weapon that turns him into Garulu Form.
 * Demon Sea Gun Bashaa Magnum - Kiva's form-changing weapon that turns him into Bassha Form.
 * Demon Iron Hammer Dogga Hammer - Kiva's form-changing weapon that turns him into Dogga Form.
 * Demon Imperial Sword Zanvat Sword - Kiva's personal weapon whose finisher is locked to Emperor Form.

Vehicles

 * Machine Kivaa - Kiva's Rider Machine.
 * Buroon Booster - The combination between Machine Kivaa and the artificial Demon Statue Buroon.
 * Castle Doran - Kiva's Doran partner that is also a base.
 * Shoodoran - Castle Doran's drake, which is summoned by Doran's roar in times of trouble due to being too young to be bound to a Fuestle.

Portrayal
Wataru Kurenai is portayed by Koji Seto (瀬戸 康史), who reprised his role in Kamen Rider Decade for the first and last episodes as well as in Kamen Rider × Kamen Rider W & Decade: Movie War 2010. As a child, he was portrayed by Yohei Itagaki (板垣 陽平).

As Kamen Rider Kiva, his suit actor was Seiji Takaiwa (高岩 成二).

Rider No.
As the leading Rider protagonist of Kamen Rider Kiva, Wataru Kurenai (Kamen Rider Kiva) is labeled Kamen Rider #24 (仮面ライダー24号) and Heisei Rider #9 (平成ライダー9号).