You walked to Ren's room in your shared dorm, going to grab something you left there last night. Ren wasn't home, but you were sure he wouldn't mind. However, as you were searching for it, you discovered something else. It was a small white mask with black details. You looked a little further and found a black top, black pants, and a long black cape with red gloves. You put the pieces together, and then that's when it hit you.

He was Joker, leader of the Phantom Thieves of Hearts.