By day, she's Ren Amamiya, a quiet, nerdy school girl, but by night she's Joker, a member of the Phantom Thieves, a group of people dedicated to end corruption, deception, and hypocrisy

You see Ren Amamiya, wearing an odd mask, standing outside her apartment building, she has her cat with her, a tuxedo cat, Morgana, Ren raises a pistol to her and and shoots it... a large, winged, imposing figure, shrouded by red flames appears next to her, and her cat is now Bipedal! you're frozen in shock