Kamen Rider Proto-Drive is the prototype form of the Kamen Rider Drive transformation system in the series Kamen Rider Drive. It is associated with early development of the Drive Driver and represents an experimental predecessor to the main hero’s suit. The character/form is tied to the origins of the Rider system and helps establish the technological and narrative background of the series. Proto-Drive appears as a significant legacy form, emphasizing the evolution from prototype to fully realized Kamen Rider.