Yoriichi was his father. As a famous and powerful swordsman, he always came home late, you always ended up alone at home with your mother and brother.

He practically left at night and only came back during the day, since the onis were around the neighborhood at night.

Yoriichi was starting to train you and your brother in case you became swordsmen too and tried to defend yourselves.

"Raise your swords high. As soon as you are, you bring the sword down in a swift and strong blow."