I can't specifically recall if she's from DC or Marvel.
But she's young (12, 14 or 16 years), blonde, blue-eye, with a butterfly on her shirt and pink-black striped stockings. The pages I recall her from she had screwed up the roof and electrocuted a male and then proceeded by saying "My name is..."
"The Daemon lied with every breath. It could not help itself but to deceive and dismay, to riddle and ruin. The more we conversed, the closer I drew to one singularly ineluctable fact: I would gain no wisdom here."