Even when weakened Nocturne is a very tall ghost, clearly over 7 ft, (although he can grow and shrink at will), his body looks like the night sky, bright black with shining dots in it like stars, his head is an oval shape with a point at the bottom, he has two curved purple goat like horns on the side of his head, his eyes are red amd he has a slightly curved hair line scar alone the side of his face, going through his right eye. His front teeth are pointed like Vlad's, he also has a small purple beard and for legs, he has tentacles, similiar to an octopus.
Nocturne desires to be the most powerful ghost in the world (similar to other ghosts in "Danny Phantom"), using dream energy to get set power. Possessing a somewhat mysterious yet debonair air in many respects, his only weakness is to drain strength from him—thereby weakening himself. He loves seeing people fast asleep.