Joker's ninja apprentice. He is a happy-go-lucky boy but also quite clumsy. He was born and raised in a ninja village. He strongly adores Joker and makes sure to protect him. He refers to himself using the personal pronoun "oira" (「オイラ」) and tends to end his sentences with "-su" (「っス」). He is very good at housework and cooking and dislikes Joker's laziness when it comes to cleaning. Hachi is very patient and easily forgives. He will not however, be afraid to voice his opinions.