Mysterion looks very much like a child superhero, as he wears a pair of white underwear briefs over his base suit, which is an off-lavender and has a bright green 'M' on the front of it. Around his waist, there is a plain, thin black belt with a dark grey, standard buckle. Brown boots adorn his feet and olive-green gloves adorn his hands. There is a dark purple cloak that drags on the ground wrapped around his neck and provides a shield for his hair or any defining features.