He is based off of an unnamed tantou once in the possession of Uesugi Kenshin. On its base was engraved the phrase "Chichibu Daibosatsu" (秩父大菩薩) in Sanskrit.
His in-game character is based around maturity, and lives by a code of self-control. While he believes that self-control is the key to being adult, his own shortcomings cause him to act childish.