Engine Bros

"Gear Engine! Funky! Engine Running Gear!" - The transformation sound of turning into Engine Bros.

Engine Bros (エンジンブロス Enjin Burosu) is one of the forms in the series Kamen Rider Build. It is the White Kaiser which is used by Rai Washio, the younger brother of Fu Washio. It is transformed to with the Gear Engine and the Nebula Steam Gun. It first appeared in The Phantom of the West, when it was transformed into and ruthlessly murdered Kiba. The suit is portrayed by Keisuke Azuma, with the voice of Osamu Adachi.