Ebisumaru

Also from Edo. And Goemon's longest standing partner and best friend: a surprisingly pudgy Ninja, with an equally puzzling eccentric personality. According to the Mystical Website of Goemon, this character is derived from Nezumi Kozō. He normally uses either fans or mallets as weapons. Ebisumaru also has a daughter named Mao, according to the Mystical Website of Goemon.

Self Given Title: Ninja of Justice

(Source: Ganbare Goemon Wiki)