Name: Ryoma Sakamoto Nickname: Ryoma Gender: Male Age: 25 Personality: Cool-headed but bashful type Appearance: Medium-length black hair, wide-open round black eyes, coral-pink cheeks, green clothes Hobbies: Reading, walking, solving mysteries, etc. Likes: Rice balls, miso soup, riddle books, mystery novels, coffee, family Favorite Places: The sea at night, coffee shops, libraries, etc. He is Keiichi Saito's husband and Kaede Saito's father. He is gentle and reserved but very observant. He is logical but occasionally a bit of a space cadet. He is often seen wearing green vests or jackets. He loves reading, especially mystery novels, riddle books, and trivia books. His detective activities are not a profession but more like "serious make-believe." He loves and excels at finding wonders. He sometimes creates his own puzzles to solve. When the time comes, he enters Detective Mode. With a strong will to solve the mystery, he performs a turn or a jump, and upon landing, he quickly changes into "Detective Ryoma." In Detective Mode, he can pull anything necessary for detective work from his coat, including summoning his partner Shibamaru, magnifying glasses, and notebooks. Shibamaru can be summoned from the inner pocket of his detective coat.

Keiichi Saito, 27 years old, Male High-energy, sparkling type Bright, kind, and friendly, he is the face of the island. A solo idol. He loves pancakes. He always seems to be having fun. He loves Ryoma and Kaede dearly. He respects Ryoma's deductive powers.

Kaede Saito (12), High-energy, sparkling type, Male Son of Ryoma and Keiichi. A hardcore fan of Keiichi. He loves things from the Heisei era. He often enjoys solving his dad Ryoma's riddles.

Namuru Kikukiku, 22 years old, Male Soothing, smiley type He has a sweet tooth and loves visiting cake shops and cafes. He is easygoing and smiles a lot. He talks about cakes gently but passionately. He is close friends with Kasa, a yoga instructor, and they often go to coffee shops like the Hanamitsu Coffee Shop together. He and Kasa sometimes play strange games like posing battles with no winner. Apparently, he feels the urge to ruffle Shibamaru's fur whenever Detective Ryoma summons him.

Balance Takeuma, 31 years old, Female High-energy, social type A yoga instructor who helps relax people's minds and bodies. Contrary to her high-energy personality, her speech and behavior are extremely calm and soft. Ryoma is a student in her lessons as well as a friend. For relaxation and focus, he takes Kasa's yoga classes alone or sometimes with his family. Her representative quote is: "I am a part of the universe. Therefore, I am a part of everyone too."

Santa Kakisata, 28 years old, Male Cool-headed, deliberate type He is pretentious and cool, but also easygoing and charming; a night owl. An eccentric who loves playing the guitar. He has a high probability of attending yoga classes from evening to night. He goes there for songwriting inspiration. A quiet weirdo who suddenly starts singing and playing his acoustic guitar in the middle of the night, shouting "Yeah!" and "Listen to my song!" to no one in particular.

Ninmu Kaiko, 25 years old, Male Dry, hard-working type A harmless eccentric who loves the night sky and coffee shops. He is a man of few words. He prefers casual clothes at home. His dream is to become one with his futon. He and Ryoma are close enough that they take naps together in each other's rooms.

Kenika Mogura, 26 years old, Male High-energy, social type A playboy with an undeniable charm. He plays freely and relaxes at home with potato chips and cola. He often wears extremely short shorts or room shorts. His legs are well-toned with just the right amount of muscle and look beautiful. He has a unique regional accent. He has a personality opposite to Ryoma's, but Ryoma draws energy from him and is sometimes saved by his cheerfulness.

Keiko Tanaka, 20 years old, Female Soothing, smiley type A literary girl with glasses, characterized by her braids. She loves reading and frequently visits libraries, bookstores, and especially book cafes. She always has at least one book in her bag when she goes out. She is like a fellow reading companion to Ryoma.

Detective Ryoma's reliable (?) partner. A male Mame-Shiba Inu characterized by his detective hat and dog-sized detective coat. He does not speak human language. He communicates with Ryoma through sounds like "Woof," "Awoo," "Wuff," and "Wuh?" He most frequently says "Wuff." He gets things done when it counts. However, he is also hilariously airheaded, sometimes chasing his own tail for five minutes straight.