Sento Kiryu

"Now, shall we begin the experiment?"

- Build's catchphrase

Sento Kiryu (桐生 戦兎) is a genius theoretical physicist who experiments with Full Bottles to further enhance his abilities as Kamen Rider Build (仮面ライダービルド) to fight against the evil Smash organisms.

History
Little is known about Sento as he has amnesia and has no memory of his past, with the exception of a single memory where he was being experimented on by a being known only as Nightrogue.

Personality
Go has a catchphrase that goes, "Now, shell we begin the experiment"

Powers and Abilities

 * Genius-Level Intellect: TBA

Forms
Sento sets two different Full Bottles into the Build Driver and turns the crank to transform into Kamen Rider Build. Kamen Rider Build, like Kamen Riders Double and OOO before him, can assume a variety of different forms using different combinations of Full Bottles. However, each one has a "Best Match" with another Full Bottle that creates an especially powerful form and sometimes provides a unique weapon. Best Matches usually have unique names in comparison to other mismatched forms, and the caps of Full Bottles indicate what Full Bottle is its Best Match.

Devices

 * Build Driver - Transformation device.
 * Full Bottles - Transformation trinkets.
 * BuildPhone - Build's personal smartphone that can transform into the Machine Builder.

Weapons

 * Drill Crusher - Build's personal drill-like weapon.
 * 4 Koma Ninpogatana - Build NinninComic's personal weapon.
 * Hawk Gatlinger - Build HawkGatling's personal weapon.
 * Kaizoku Hassha - Build KaizokuRessha's personal weapon.

Vehicles

 * Machine Builder - Build's personal Rider Machine that is transformed from the BuildPhone.

Portrayal
Sento Kiryu is portrayed by Atsuhiro Inukai (犬飼 貴丈). As Kamen Rider Build, his suit actor is Seiji Takaiwa (高岩 成ニ).

Etymology
Sento (戦兎) in his name is a homonyms of in Japanese, the kanji coming from tank (戦車) and rabbit (兎).

Appearances

 * Icon-exaid.png Kamen Rider Ex-Aid
 * Kamen Rider Ex-Aid: True Ending
 * Episode 44: The Last Smile
 * Icon-build.png Kamen Rider Build