Disappearance

This character becomes the subject of the (sudden/mysterious) disappearance. Temporarily or permanently. According to their will or not. It may also be the complete disappearance of a character out of this world, which cannot be equated to common physical death. For example, the repose of the soul that existed in this world as a ghost, or the disappearance of the physical and mental component of the human, as if he/she never existed, due to interference of someone's special powers.