Undertaker is an eccentric, enigmatic individual who giggles frequently, appreciates laughter, enjoys frightening others and provoking reactions with his strange mannerisms, and spends a considerable amount of time in coffins. Because corpses, many of which victims of the underworld, are ordinarily delivered to his place of business, Undertaker is able to inspect them, whom he refers to as his "guests," remove their organs for research, and obtain useful information, which he refuses to exchange