Okita Sōji
Watsuki based many of his characters on historical figures, characters from other manga/anime, and video games series. For example, Himura Kenshin was based on Kawakami Gensai, one of the Four Hitokiri of the Bakumatsu. Four years after the revolution ended, Gensai was falsely accused of a crime and was executed. Watsuki admires Kenshin for his desire to do good in honor of those whom he had to kill so the Meiji Government could exist. In addition, Saitō Hajime was based on the historical Saitō Hajime, a member of the Shinsengumi although Watsuki admitted altering him to the point of fan complaints. Several other characters, most notably Sagara Sanosuke, Shinomori Aoshi, and Seta Sōjirō, are also loosely based on certain figures among the Shinsengumi. Okita Sōji, Ōkubo Toshimichi, and Katsura Kogorō are among numerous other historical figures who make appearances in the story. Yukishiro Enishi's minion Gein was based on puppeteer and serial killer Ed Gein.