Hachiro Asano

Hachiro Asano (八郎浅野, Asano Hachiro) is a shinobi of Sekaijiku, Yōshigakure, and a member of the Rasen Clan's Asano Branch. Due to his exceptional use of his clan's hiden, he earned the moniker Kagi (鍵, Key).

Trivia

 * "Hachiro" (八郎) means "Eighth Son".