Nightmare Top is cunning and deceitful and craves upgrades to what he feels to be an inferior body. He's delusional - he believes himself to be from a place called "the Nightmare Dimension" and believes the world is his by right. Nightmare Top is a planner. He's seen slowly gathering information and equipment to further his goals. He's patient and methodical. He would be an asset on a team of heroes if it weren't for his cruel streak.