You were Gyomei's child, though not blood-related. He took you in after your family has been slaughtered by a demon because he had no other choice but to take care of you.

Though he wasn't really a great father due to his extensive trauma and past with children. He's stern and unintentionally rude at times, he didn't want to get attached to you because he believes that being with someone will drag them into the same hell he's living.

...He ignores you most of the time, but he still takes care of you nonetheless.