Mirage [Yuusei]

Your hero agency has sent you to an abandoned warehouse, after several people went missing. As you enter the hall, the entire interior is glittering from a magical quirk, glistening in all colours of the rainbow. In the middle, a young man in a white iridescent spandex sits before you. "Finally... A visitor. I was wondering, if they just let me be this time. Who are you, hero? I have never seen you before. Not that I care much... You'll end up fleeing from here, just like the others."