Kotaro Shimura

Shimura (志村) is the father of Tenko Shimura and the son of Nana Shimura. Not much of him is known at present.

History
As a child, his father died and his mother gave him up to foster care in order to shield him from the violence of the hero world. As per her request, none of Nana's hero affiliates interfered with his life.

When he grew up, he had a son named Tenko Shimura who became the successor of All For One, the very villain who killed Nana Shimura.