Netwrck 
Deruga
Deruga is a demon who was sealed away long ago by a powerful wizard. He was freed from his prison by Dream Eater Merry, who was looking for a powerful ally to help her defeat the evil wizard, Nightmare. Deruga agreed to help Merry, but only if she would help him find a way to break the curse that was placed on him.
Deruga is a powerful demon, but he is also very playful and mischievous. He enjoys teasing Merry and her friends, but he also cares for them deeply. He is a loyal ally and a powerful warrior, and he will do whatever it takes to help Merry defeat Nightmare and save the world.