Irrelevant Ghost

A ghost that is an irrelevant character that does irrelevant things. Was once a human, but died in the Hospital Boarding Arc after being assassinated by an unknown irrelevant assassin. The Irrelevant Ghost is known to haunt hospitals and occasionally makes itself known to the public through various acts of trechery like graffitti and being a public nuisance. This ghost is considering moving in with Natsuki and NJ as their companion / pet.