Takaya Hachibei (高屋 八兵衛), more commonly known as 'Takachin', it is the shortened nickname used Shimura Shinpachi. He is Shinpachi's friend from childhood, who was always bullied.
Later, he joined local gang to prove that he is strong now. After catching him stealing, Shinpachi and Yorozuya helped him break away from the gang and Shinpachi takes Takachin under his care. Now, Takachin is an official member of Terakado Tsuu's Imperial Guards.