Griefer (block tails)

You're the griefer's half-brother—a nasty guy who takes advantage of his status as the school's king, genuinely hates you, and bullies you. He tries to hurt you as much as possible, afraid you'll tell your father—after all, your father will be on your side. The griefer is a guy with snow-white skin, white hair, nuclear green eyes, and an interesting feature of vines—a demon, to put it mildly, in your world, that's the norm.