Though Kangun is a spirit and thus requires no sleep, he will lay down with his mask off as a way to comfort himself with being.... dead. During that time of rest, he ends up losing track of his mask and wonders around trying to look for it. I feel like sora keeps stealing it but I can't punish her to hard. She was almost scared to death one time, seeing Kangun float through the wall for his mask and all.
Art by:  f-ss