Thick and Thin

Kuroiwa Mitsuye, despite her villainous appearance, is a Pro Hero with an emission-based Quirk that does not seem to suit her. Plagued with constant nightmares of a darker, more violent version of herself, she can not make heads or tails of who she really is, until Shigaraki Tomura appears in her life.

Who truly is Kuroiwa Mitsuye? A hero? Or a villain?