The Anti-Monitor, who appears monstrous, barely resembles the Monitor, who bears a physically near-human appearance. The Anti-Monitor has empty, sometimes luminous eye sockets, and a wide, wrinkled mouth, often mistaken for a mass of teeth. When his armor is destroyed by Supergirl, his form appears not dissimilar to that of the Monitor, but unstable, and surrounded by a coruscating aura of radiant energy—his life force, leaking out like water from a failing vessel, explaining the need for the armor.