Icon-build.png This article is about a/an character in Kamen Rider Build.

"I'm tired... Sleepy... Want my money..."
―Misora after using her powers[src]

"Hi~! It's everyone's idol, Mii-tan here!"
―Misora when starting web videos as Mii-tan[src]

―Misora when criticizing Gentoku's fashion sense[src]

Misora Isurugi (石動 美空 Isurugi Misora) is the 19-year-old daughter of Soichi Isurugi who works with Sento Kiryu by using her ability to purify Fullbottles. Often secluding herself in nascita's basement, she is more well-known as the online idol Mii-tan (みーたん Mītan), using her huge following of fans to help her seek out and collect information. She later uses the CD Fullbottle to briefly become the CD Lost Smash (CDロストスマッシュ Shī Dī Rosuto Sumasshu).

Character History

In her childhood, her father Soichi Isurugi would often read to her. Misora would point out several things of her liking, which would eventually become the basis of Kamen Rider Build's Best Matches.

Misora was just a young girl when the Sky Wall Disaster caused her to fall into a seven-year coma, thus unlocked her Fullbottle purification ability. She was admitted into the same mental hospital as her own father, which later after a month, Soichi (who was possessed by Evolto), escaped and kidnapped her into Faust where she believed she was purifying bottles for good. However she realized the evil intentions of Faust and lost the will to purify any more, so Soichi escaped with her back to Nascita where she was convinced by Soichi to purify the bottles for good. To this day, she remains in nascita's basement in hiding because she is still wanted by Faust.

Misora was briefly held hostage by Massugu Ubukata, only to be flattered when he called her cute. Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!

On the eve of the proxy battle between Touto and Hokuto, Misora was entrusted by Sento with a killswitch he had created to break the Hazard Trigger should he go berserk, at the cost of his life. Spectating the event, Misora was unable to follow Sento's request even as his rage threatened to kill Grease. Thankfully, Banjo, having been called by Sawa, intervened at the last moment and saved the lives of both Kazumi and Sento. Victory of Tears

Later, she was kidnapped by Evolto, who turned her into the CD Lost Smash. Another Build

During the Build Annihilation Plan, both Misora and Sawa were among the Japanese populace whom had been compelled by "Kengo Ino" to eliminate Sento. Eventually, however, they were freed by the influence of Vernage. With her bracelet, Misora combined the Gold Rabbit and Silver Dragon with the Genius Fullbottle, allowing Sento and Ryuga to become Kamen Rider Build Cross-ZBuild Form and defeat Kamen Rider Blood. Kamen Rider Build: Be The One

New World

Sento meets the new Misora.

After Sento defeated Evolto for good, the new world was successfully created. This world’s version of Misora now working with her dad at Nascita and first shown serving Kazumi and his underlings drinks, only to be startled by Kazumi's infatuation for her. Shortly afterwards, Sento arrives at Nascita and orders a coffee. Misora saw Sento's face and said that she had a feeling that they have met before, although Misora didn't remember Sento's name. Her dad instead exclaims that Sento is Taro Satou and asks for an autograph. Misora is last seen berating her dad to continue on working, while at the same time mimics one of the Tsunagizu moves and catchphrase. The Tomorrow Build Will Create

Misora temporarily regains her memories of the previous world as a side effect of Futaros using his powers to let Ataru Hisanaga from the real world meet the characters of the fictional Kamen Rider Series. She reunites with Banjo and Kazumi briefly, though she loses her memories again shortly afterwards and mistakes them for unfamiliar fans of hers. Later, as Tid's forces wreak havoc on the people, Misora attempts to guide panicked civilians away from danger. They are saved by the intervention of an anamnestic Grease and Rogue, and Misora attacks one of the enemies with a street sign while leading the people to safety. Misora's memories from the World of Build are presumably lost again after the defeat of Another Ultimate Kuuga and Ataru's return to the real world, once again leaving Sento and Banjo as the only ones who remember their old world. Kamen Rider Heisei Generations FOREVER

Eventually as the alien Killbas forces Ryuga to recreate the Pandora Box with the white Pandora Panel, memories from the old timeline resurfaced in Misora's mind, along with everyone else exposed to Nebula Gas in the previous world. She and the rest of Team Build reunited with Sento and Ryuga. Build NEW WORLD: Kamen Rider Cross-Z

Misora Isurugi Grease.png

After the Killbus incident, she is being watched by a joyful Kazumi when she suddenly asks him to go out with her. Believing it to be a date, he puts on a suit and goes shopping with her, but is heartbroken when he learns that she only wanted him to help her find a present for her dad (although she leaves him with a gift, a free carabiner they had received while shopping), which made him frustrated.

However, Misora is being ambushed by Uraga and several Guardians. The Hokuto Three transform into Smashes to defend her, only for Uraga to use the stolen Build Driver and Hazard Trigger to transform into Kamen Rider Metal Build. Meanwhile, Kazumi heads to a park to think; he discovers the gift that Misora had given him earlier in his pocket. Metal Build easily defeats the Hokuto Three, but Kazumi interrupts as Kamen Rider Grease; he, too, is defeated by Metal Build, who takes Misora hostage with the real Pandora's Box white panel as ransom.

Fortunately, Misora is being rescued by Banjou, while Kazumi finishes Uraga, as Phantom Build, off, in which Misora witnessed. Misora thanks a wounded Kazumi for saving her before the Hokuto Three, whom Kazumi thought to be dead, arrived by surprise. She later asks Kazumi for a date in which he accepts, much to his joy. Build NEW WORLD: Kamen Rider Grease


Misora was shown to be aloof, and rather lazy. Usually, she talks in an almost monotonous tone and uses short words. However, once she assumes her alter-ego Mii-tan, she's shown to be a total opposite from her usual, gloomy demeanor. Ever since the war between Touto and Hokuto, her lazy personality seemed to have disappeared and she seems to be more active. This is probably because she hasn't made any Fullbottles ever since Sento made the RabbitTank Sparkling Fullbottle.

It is revealed that her shut-in personality stems from being secluded from society for so long, as she tells Ryuga during their "dates". She always wanted to live a normal life, however, her power to purify Fullbottles makes her unable to do so. To this day, Misora openly states she didn't want the power.

Misora cares deeply for her allies, especially Sento and Banjo as she would always try her best to help them out with their own problems. Although, she is rather cold towards Kazumi for being her fanboy & Gentoku for his ridiculous fashion senses.

She also still cares for her dad unconditionally, even after knowing her father is Blood Stalk. When she finally found that Soichi is possessed by Evolto, she becomes enraged at Evolto while demanding to give her father back. Although, she still believe in his word to help Sento.

However, when Misora was possessed by Vernage, she'll turn sarcastic and sharp-mouthed, although her speech also carries a sense of royalty and dignity due of Vernage being the Queen of Mars.


Misora's Golden Vernage Bangle.

Double Rabbit Hazard

  • Fullbottles Purification: Misora has the unique ability to purify Fullbottles that receives Smash materials to make them compatible with the Build Driver using her unlockable Golden Bracelet. This ability drains most of her energy, and she herself states that she'll fall unconscious for one week after doing so. This special ability is synchronized with Misora's willpower. Misora explained that when she purified Fullbottle, she saw a vision of Mars during it's destruction. When she think strongly that Earth didn't have to suffer the same fate, the purification succeeded. However, for it to work, Soichi had to trick her into believing that she was using her powers for good, so that she would purify Fullbottles willingly; also Misora ​​was able to purify the Nebula Gas that surrounded Ryuga Banjo by the Sclash Driver.
    • The bracelet, notably, has an effect on a Hazard Form in Berserk mode, causing it to become a double version of one of the Fullbottles used for the match. This manage to knock Sento to his sense for a while and cancel his transformation. This effect would later become the basis of the FullFull RabbitTank Bottle.

Misora healing Taizan Himuro.

  • Healing: Through unknown means (most likely stemming from her bracelet), Misora could heal wounds just by touching them with her hands. However depending on the severity of the injuries, she will lose consciousness after doing so.

Vernage Manipulating the Sky Wall Structure

  • Sky Wall Manipulation: During the Seito Invasion of Touto, Misora unconsciously manipulated the structure of Sky Wall temporarily to ward Rogue and Washio Brothers away.
    • Aerokinesis: This is primarily done using a strong gust of wind. When doing this, Misora's eyes turned emerald green because she was taken over by Vernage inside her bracelet. However, Misora will lose consciousness after doing so.
    • Teleportation: Misora (or in this case Vernage) could Teleport herself and anyone to Nascita when in danger.


  • Purification Exhaustion: Though she can purify bottles with her Golden Bracelet, this ability drains most of her energy, and she herself states that she'll fall unconscious for one week after doing so. To lessen the strain, Misora uses a specialized booth built by Sento, mitigating her fatigue to general exhaustion. She may also lose consciousness from her healing abilities.


CD Lost Smash

CD Lost Smash

  • Height: 199.6 cm
  • Weight: 96.0 kg


  • The CD Lost Smash is armed with multiple disk-like protrusions, which can rotate up to 120 000 rpm, scraping enemy armor.
  • Additionally, the CD Lost Smash can generate CD projectiles, called Glare Slicers (グレアスライサー Gurea Suraisā) to attack enemies.
  • The CD Lost Smash is extremely agile, specialising in good rhythmic avoidance patterns and close combat manoeuvres.

Appearances: Build Episode 43




Friends/Team Build:

  • Sento Kiryu: Sento was introduced to Misora by Soichi Isurugi. Despite how they bicker, Misora shows herself caring for Sento. When he asks her to activate a switch he made for the Hazard Trigger, in case he loses himself again, Misora refused to, showing her feelings of caring towards him. Overhearing Sento about using the power of a Pandora panel to boost his Hazard Level but could possibly end up killing him, she tries to stop him from dying while letting out her feelings for being more than being just family.
  • Ryuga Banjo: When Ryuga met Misora, they don't get along a bit until later during his struggles of losing his girlfriend. Hearing that Ryuga possessed alien DNA, Misora felt she wasn't alone being the only weird one.
  • Sawa Takigawa: Both Misora & Sawa share a sisterly relationship. Despite being a spy still for Nanba, though angry for the deception, she forgave her and took her back.
  • Kazumi Sawatari: Kazumi was Misora's number one fan and who harbors a loving crush on her as Mii-tan. But she doesn't call Kazumi by his name nor "Kazumin", she instead calls him Grease until after his death which left Misora totally devastated. She admitted that she feels awkward of his infatuation for her due to him being her number one fan. To cover up for this, she often acts antagonistic towards him, even in New World. Although, after Kazumi saves her from Keiji Uraga, she finally starts dating Kazumi.
  • Gentoku Himuro: At first an enemy as Night Rogue then Kamen Rider Rogue, later as an ally when asked to join them after his father's death and when Utsumi became MadRogue joining Evolto, wounding him. Misora finds Gentoku's new fashion styles lame and disgusting until Gentoku wears a leather jacket.


  • Evolto: Learning her father was possessed by Evolto, she desired to get him back from his possession.
  • Nariaki Utsumi: Utsumi grabbed the Evol Driver from Misora with the Transteam Gun pointed at her to give to Evolto.


  • Soichi Isurugi: Misora's father who was possessed by Evolto ends up in the hospital when Evolto leaves him to possess Ryuga.
  • Vernage: The queen of Mars possessed Misora as a little girl, trying to prevent Pandora's Box from being opened by Evolto. Years later, during the Touto-Seito war, Vernage awakened once again inside Misora and later warns Team Build to prevent Evolto's annihilation of Earth.
  • Takumi Katsuragi: Sento's alter-ego who's the opposite of him. She tries to get through to Katsuragi on what it means to be having heart in people, not just in mind.

Behind the Scenes


Misora is portrayed by Kaho Takada (高田夏帆 Takada Kaho). As Vernage, her other voice is voiced by Sora Amamiya (雨宮 天 Amamiya Sora).

Concept Art

CD Lost Smash concept art

CD Lost Smash was designed by Tamotsu Shinohara (篠原 保 Shinohara Tamotsu).



Sento Kiryu (Takumi Katsuragi) - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto - Nariaki Utsumi - Shinobu Katsuragi
Movie-exclusive: Kengo Ino - Killbus - Keiji Uraga
Transformation Gear
Fullbottles - Build Driver - Transteam Gun - (Great) Cross-Z Dragon - Sclashjellies - Sclash Driver - Hazard Trigger - Nebulasteam Gun - Cross-Z Magma Knuckle - Evol-Driver - Evol-Trigger - Grease Blizzard Knuckle - Killbuspider - Grease Perfect Kingdom
Drill Crusher - Hawk Gatlinger - 4Koma Ninpoutou - Kaizoku Hassyar - Fullbottle Buster - Steam Blade - Beat Closer - Twin Breaker - Muscle Glove - Solstall Wings - Giant Scratcher - Space Ride Arm - Spine Knuckle - Long Range Cleaner - Trash Converter - Gold Lio Gauntlet - Multi Deluge Gun
Pandora Box - Halfbodies - Fullbottle Holder - Build Phone
Vortex Finish - Hazard Level - Project Build - Sky Wall - Nebula Gas
nascita: Misora Isurugi - Soichi Isurugi - Sawa Takigawa - Kazumi Sawatari - Gentoku Himuro
Kamen Riders: Eiji Hino - Gentaro Kisaragi - Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Hiiro Kagami - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Sougo Tokiwa - Geiz Myokoin - Tsukuyomi
Prime Ministers: Taizan Himuro (Touto) - Yoshiko Tajimi (Hokuto) - Masakuni Mido (Seito)
Namba Heavy Industries Ltd.: Juzaburo Namba - Nariaki Utsumi - Haruhiko Wanibuchi - Guardian
Hell Bro's: Fu Washio - Rai Washio - Yoshikazu Takahashi - Norio Matsui
Aliens: Vernage
Gentoku Himuro - Evolto - Nariaki Utsumi - Takumi Katsuragi - Shingo Kuwata - Eita Kawai - Yoshikazu Takahashi - Norio Matsui
Touto: Needle Smash - Strong Smash - Burn Smash - Flying Smash - Mirage Smash - Square Smash - Press Smash - Ice Smash - Stretch Smash
Hokuto: Castle Hard Smash - Stag Hard Smash - Owl Hard Smash
Kaiser: Kaisei Mogami (World of Build, World of Ex-Aid)
Kengo Ino - Ryoka Saiga - Mitsuomi Gobara - Evolto - Killbus
Keiji Uraga - Simon Marcus (Phantom Crusher)
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