But it turns out there was also an alarming number of Nazi costumes, including costumes based off Red Skull, Hydra and Nazi HelloKitty. This costume has the split design (red on one side, fat thor costume black on the other) that mirrors Harley Quinn’s own duality: intelligence versus insanity. Here are some tips you can use to create your own costume. As first reported by Bleeding Cool, Rose City Comic Con released an updated costume policy on Thursday, banning all Nazi-related costumes.