Birthday: May 20

Zodiac: Taurus

Hair: Teal green

Eyes: Light brown

Height: 179 cm

Weight: 67 kg

He is described as an assassin and is one of the strongest swordsmen of the Kiheitai, under the leadership of Takasugi. He is a member of the Kiheitai, an extremist Joui faction bent on causing world destruction.

Bansai is always seen wearing a pair of sunglasses and large headphones decorated with a yin-yang pattern. He regularly keeps his headphones on, as well as sun glasses even while others are talking to him. He carries and is skilled at playing a shamisen, which also doubles as a tool for tying others up or as a weapon similar to a garrote.

On top of being famous as a skilled swordsman, Bansai is also a talented songwriter. He works as a music producer under the name "Tsunpo," and Otsu's newer songs are written by him. Bansai's background remains unknown; however, it is known that he fights alongside Takasugi in order to destroy the "rotten" world which resulted from the loss against the alien Amanto after the Joui conflict.

It is uncertain how much Bansai actually picks up from his conversations with other people, seeing as he is always wearing headphones, that is also how he got the nickname Deaf Man.

Bansai is shown to have an extremely calm demeanor, which covers up the fact that he has a vicious, almost cruel personality which actively seeks out conflict.

Bansai is very invested in his music hobby, frequently playing his shamisen and often comparing to other characters as musical genres. Bansai refers to Gintoki as drunken humming and Hijikata as a children's anime theme song.

Being a refined speaker, he speaks in the Japanese humble manner by using "de gozaru" at the end of the sentences and referring to himself as "sessha," a notably antiquated way of speaking.

Bansai's name is roughly based on that of a hitokiri of the Bakumatsu era, Kawakami Gensai, while his stage name is based on the musician Tsunku.