"Cosplay is a form of empowerment for all children and adults," says Stanford Carpenter, president and cofounder of the Institute for Comics Studies, who says that he used to be dismissive of cosplay. But after attending dozens of ComicCons, he witnessed the dress-up affair changing masked heroes indefinitely. "It's about empowerment. It's about the possibility of what you can be or what you can do. And when you see people in underrepresented groups, it takes on the empowerment fantasy of not...