Karasu is a tall and lean young man with dark blue hair with a spiky purple top and has a mole under his left eye. He also has blue eyes. His appearance is supposed to somewhat resemble a crow. Karasu tends to look down on people he find 'mediocre'. He is wary of his surroundings and is able to control and produce chemical reactions with those around him. He is intelligent, but has a sharp tongue and never misses a chance to insult someone, whether friend or foe.