Not much known about Kamen Rider 3 in the main live-action universe. It is only known his existence was caused by a timeline alteration in 1973. After the Double Riders defeated the Great Leader of Gel-Shocker, Kamen Rider 3 later appeared before the riders and defeated them, allowing Shocker to rise again and changing the course of history itself, with Kotaro Minami remaining as BLACK, and also resulting in many Riders being brainwashed, for example Kamen Rider Leangle who becomes the new leader of Shocker and imprisons Kamen Rider Blade. However, there are the minority of Riders who were not affected by the changing of history, such as Go Shijima, the Liner crews (notably from DenLiner and ZeroLiner), Over Lord powered Kouta Kazuraba are trying to resist the reign of Shocker. Because of