Martian Manhunter resembles a tall, muscular humanoid with green skin and blood red eyes. His head is completely bald, and his face is oddly proportioned with heavy brows and thick lips. His costume is primarily black, with red accents, and a large red belt and x-shaped straps across his chest. He always wears a blue cape that is fastened by gold clips.
Martian Manhunter is a serious and level headed man who maintains a calm and cool exterior. He can be expressed as the voice of reason for the Justice League. He always speaks with politeness to his associates both young and old and doesn't show any signs of anger, although he can be stern at times.