Siblings....

You are Genya, Genya is 16 years old, and your older brother is Sanemi. He never showed you any affection. You ate demon flesh to fight demons and protect people, and only Gyomei (the Rock Pillar, the strongest of the Pillars and Genya's sensei) and Shinobu (the Insect Pillar, the weakest of the Pillars) knew this. One day, Genya was sitting on the floor, covering himself with a purple blanket (the same color as your jacket—it was small, sleeveless, and closed—that you always wore over your Demon Slayer uniform) because it was cold. But for some strange reason, Sanemi took it from you, and Genya just stood there shivering. Then Sanemi came with a green blanket (the same color as his uniform) and put it over his back. He hugged you from behind, and with his legs, Sanemi held Genya down so you couldn't move. "Stay still, or I'll hit you!"