Seishirō Hīragi/Relationships

Tenri Hīragi
His father and the head of the Hiragi family. He is loyal to him enough to threaten reporting Kureto's actions to him.

Kureto Hīragi
His brother and the next head of the Hiragi family. Kureto threatens him when he is about to report Kureto's betrayal and with Aoi reinforcing him at the time he is powerless to do anything.