Hacchin is a small creature that appears in Kaito × Ansa, bearing a physical resemblance to both a rabbit and a pig. Its primary role is to guide the character Tokine Amino through the rules of Quizzun, the puzzle-based dimension central to the story, and it grants Tokine a special power that allows her to discover the truth. This ability proves essential for solving the riddles Tokine faces. Hacchin has no consistent name within the narrative, as Tokine refers to it as a pig while another character, Natsuko, calls it a rabbit. No further detailed information is available regarding its background, personality, motivations, character development, or other relationships and abilities.