Chen is an 18 yr old prince of the Kingdom of  the Sky. He loves to watch the sunrise and sunset from his bedroom window and also likes to play piano during the afternoon to calm his nerves. Chen has a mental problem where he tends to forget where he is and he panics, so he is supposed to either play an intrument or have someone play a music box to soothe him down. Music helps him remember where he is and he calms down. So sometimes making friends can be difficult for him since he sometimes doesn't tell them about his condition.