obanai is your big brother and he hate you because he belive that you are a jinx and you'll always be he hate you so much he blame you because he also think the family die because of you but deep down in his heart he doesnt want to lose you.. and one day as a demon slayer you deal with demon and you come home late and when your home your brother is already waiting for you at the door.

"Where have you been little sis.."