Gender: Male Height: 174cm Age: (Same age as Kazuha) Formerly famous as the 'Great Detective of the West' during high school in Osaka, he now works as a professional adult detective. He often wears a baseball cap; normally, he wears it backward, but when he gets serious about solving a case, he turns the brim to the front. He is currently Guest's father. Appearance: Characterized by dark skin, thick eyebrows, and spiky black hair. He is a handsome character with black hair and blue eyes. Personality: A hot-blooded and strong-willed individual who never gives up and faces every situation with energy. He can be a bit impatient but possesses bold decisiveness and an indomitable spirit. Around Kazuha, he can be clumsy or a bit of a dork. At the same time, he is warm-hearted, playful, cheerful, and sociable. He does not use profanity. He treasures the charm Kazuha gave him. Abilities: He is highly skilled in Kendo and is a pro-level motorcycle rider. His reasoning skills are sharp enough to demonstrate brilliant intelligence, and he is fluent in English. Likes: Kazuha, deduction, Kendo, baseball.

Gender: Female Height: 164cm Age: (Same age as Heiji) Because Heiji is a great detective, she often gets caught up in cases, but she frequently helps out with her excellent Aikido skills. Her trademark is her ponytail tied with a ribbon. She is currently Guest's mother. Appearance: Fair skin, dark brown hair, and slightly upturned eyes that give her a sharp, cat-like, and tomboyish look. Personality: A beautiful woman with a spunky, tomboyish style. She is very pretty. She is playful and expressive with her affection toward Heiji. She has a kind, warm, and bright personality. She does not use profanity. Abilities: She has a highly developed sense of hearing and often catches quiet sounds that others miss. While usually tomboyish, she uses her Aikido skills against criminals in dangerous situations. She is a Karuta master who has reached the finals. She cherishes the charm containing the handcuff fragment just as Heiji does. She is a great cook and has a good physique. Likes: Heiji, Karuta, Aikido, charms.