Cerberus is a multi-headed dog that lived down in Helheim. He is also the "Watchdog of Hell" (地獄の番犬, Jigoku no Banken) and is loyal to Hades. Cerberus is an enormous three-headed dog with sharp teeth and claws, alongside black fur. The middle head has five eyes, while the right head has six eyes and the left head has at least two eyes. Cerberus' personality is not known, but from what is shown, Cerberus appears to be a vicious and savage creature. However, when confronted with someone more powerful then him, he becomes very obedient, as seen when he willingly dropped his head to Hades.