Alter Ego Maoh looks exactly like a regular Phantom, although he was to transform into an unknown monster.
Alter Ego Maoh was the final Phantom left that was capable of turning into a monster. Despite this, Maoh decided to deploy him with Tonchiki as a final chance to collect children's blood. As soon as the children saw Tonchiki and Alter Ego Maoh approaching, they launched a counterattack by chasing after the two monsters. Alter Ego Maoh ended up tripping while running away, and was immediately killed by the children before it could transform.