Mitsuyoshi

Jubei is one of the six heroes, and Kokonoe's father.

Information
Jubei is one of the Six Heroes, Ragna's master, and Kokonoe's father, who battled the Black Beast alongside Hakumen, and may have played a part in the Ikaruga civil war. The Kaka Clan were genetically engineered from his DNA. Despite his appearance (he is considerably short and does not come off as threatening, resembling a cat more than either of his descendants), he is a powerful warrior, with numerous characters referring to him as the most powerful being on the planet. He works to safeguard his friends in their times of need.

An interesting fact to note, Jubei is actually the one to finish the enemy in Taokaka's Astral Heat.