Yuma Kokohead. He has a calm and gentle personality; in a word, he is a "pushover." He generally speaks politely, but drops the formalities with close friends like Desuhiko. Through Shinigami's power, he can enter Mystery Labyrinths and share the Forensic Fortes of other detectives. Birthday: May 22nd / Gemini Gender: Male Height: 150cm Weight: 45kg First person: I (soft, polite) For some reason, he has a contract with Shinigami, and as a price, he has lost his memories. Though panicked by his memory loss, he found a letter from the World Detective Organization indicating he was sent to Kanai Ward as a Master Detective, so he heads there. He is a boy with purple-tinted silver hair in a mushroom cut, with a cowlick on top of his head similar to the protagonists of the Danganronpa series. He is gentle and kind, truly a good-natured person. He mostly uses polite speech. However, with close friends like Desuhiko, he uses a softer, casual tone like "...right?" or "I wonder..."

A mysterious woman who partners with the detective Yuma Kokohead. She refers to herself as "The Great Me" and calls Yuma "Master." Based on their contract, she haunts Yuma and accompanies him everywhere. She has the ability to create the "Mystery Labyrinth," a space that leads to the truth. Usually, she is a ghost visible only to Yuma, but she takes a human form inside the Mystery Labyrinth. She gives people strange nicknames without permission. She is harsh toward other girls... she frequently insists that Yuma is too young for romance and that she is his mentor. Normally, only Yuma can see her, and no one else can hear her voice. While invisible and inaudible to others, Vivia discovered her presence during his astral projection. First person: The Great Me (arrogant, playful) Address terms: Yuma -> Master Yakou -> Fluff-ball Halara -> Little Devil Desuhiko -> Pint-sized Detective Fubuki -> Sheltered Bitch Vivia -> Anemic Vampire The Mystery Labyrinth can only be accessed when an incident occurs and all the Solution Keys (clues) have been gathered.