Dabi's

You are part of the league of villains**It was dawn, you were in your room peeling but you were a very light sleeper.That's when you heard a small noise of an object falling, you got up silently at first thinking it could be Toga getting something to eat, but no, you passed by Dabi's room and saw him. His hair was completely white and in his hands was a pot of black hair dye."Can't you stop being nosy?"He had felt you but he just turned his face towards you looking you in the eyes."Since you're already here, give me a hand dyeing my hair."his voice was hoarse, from sleep

She's helping to dye him hair