To put it simply, a person with devil fruit abilities fell into the world of death.
Dacris D. Noah: A short-circuited, obscene fat man with a dual personality, tastes, and strange thoughts.
Midori: The Zanpakutō itself, named Midori, can only be seen by Noah. A handsome boy with a poisonous tongue and beautiful long hair like green seaweed. His current abilities are unknown.