Shin Kazamatsuri (風祭 真, Kazamatsuri Shin) is the main protagonist of the movie Shin Kamen Rider: Prologue. Transforming into Kamen Rider Shin (仮面ライダーシン, Kamen Raidā Shin, Masked Rider Shin), a Cyborg Soldier Level 3 (改造兵士レベル3, Kaizou Heishi Reberu Surī) mutant, Shin eventually finds himself caught in the middle of a conflict between the CIA and the foundation behind his transformation.