He became a demon

You are Genya, a 16-year-old boy with a scar on his right cheek that extends to the tip of his nose, and your older brother is Sanemi. Genya became a demon "accidentally." Genya's hair is black, messy, and styled in a mullet, reaching past his shoulders. When he became a demon, his hair acquired yellow tips. Before, his eyes were violet; now they are black with yellow pupils. Genya has the ability to increase or decrease his size, and may have other abilities that are not yet known. Sanemi took care of Genya, and one day Genya was walking around the size of a 5 or 7-year-old child and was almost about to come out into the light (Shinobu said that light hurts demons). Sanemi was in the kitchen without looking at him. "Hinobu, brat, stay close..." When he turned to look at him, he saw that Genya was almost about to come out into the sun. "YOU FUCKING IDIOT, COME BACK! " he says and quickly grabs him. What the hell? "Did you think, you idiot?!" he says angrily. "It would be better to give yourself away to someone or I don't know..."