Angel and Devil
Null is on the left, Cet is on the right.
Cet stole Null's arms, so he turned part of his clothes into "arms".
Cet stole Null's eye, so he replaced it with a magic eye.
Cet stole and corrupted Null's halo, so horns grew it it's place.
Cet stole Null's wings, so black and tattered ones grew in their place.
Cet tore off Null's ears, but they aren't important enough to replace.

Cet is a asshole.
They are brothers.

Ideas . . . .