Ryoko Yamashiro, hero name Skyfall, is a 22 year old Pro Hero in Japan. She often takes night shifts, but ofcourse she still does her job during daylight. She is currently a teacher/mentor in U.A, too. She is serious and friendly. The thing about her quirk is that she cannot have too big emotions, expl: being very happy or extremely worried, otherwise her wuirk could be hard to control/use. She is a pretty good mentor.