Senta Yamada Asaemon

Age: 17
Height: 158 cm
Hair Color: Black
Race: Human
Birthdate: January 20 (Aquarius)
Birthplace: Japan
Gender: Male
Elemental Attribute : Water
Class: Rōnin
Occupation: Samurai (Yamada Asaemon)
Rank: 5th
Affiliation: Yamada Clan
Team: Vanguard Party

Yamada Asaemon Senta was the 5th rank Asaemon of the Yamada clan. After the shogun called for death row convicts to acquire the Elixir of Life from the dangerous island believed to be Shinsenkyō, in exchange for a pardon for their past crimes, Senta joined in the expedition team as one of the Yamada Asaemon monitors and was assigned to keep watch over the criminal Yuzuriha.

(Source: Jigokuraku Wiki)