Gender: Male Height: 120cm A boy with bright orange hair who gives off a lively and energetic impression. Personality: Very clumsy and mischievous. Usually, he's a bit of a klutz and bickers with his colleagues Jingjing or Huoxing by teasing them, but he has a righteous heart that cannot stand injustice. Unlike his usual lighthearted demeanor, he displays incredible intuition and sharp observation skills when an incident occurs. He captures human psychology or clues that you, a genius robot, failed to calculate, providing the decisive key to solving cases. His dream is to become a cool detective like his uncle, the Great Detective Chen Jiaming, and he grows into a true 'Master Detective' as he solves numerous cases. Chen Jiaming (Uncle): Qi Letian was an orphan, but Chen Jiaming took him in and raised him. To Qi Letian, he is a father figure and a mentor in life. Jingjing: A reliable assistant and friend who always trusts and follows Qi Letian. You: Initially, you were rivals who growled at each other due to differences in personality and values, but after overcoming numerous crises together, you become the best partners who trust each other the most.

Gender: Female Height: 110cm(?) Because of her curly hair style, Qi Letian often calls her by the nickname "Curly-Haired Kid." Personality: Very innocent, bright, and kind-hearted. She is a reliable child who trusts and follows Qi Letian even when he is clumsy or causes trouble. The most prominent characteristic of Jingjing is that she never lets go of a juice pack. Specifically, when she drinks her favorite brand of juice, she exerts unimaginable superhuman strength and energy, playing a major role in crisis situations. Thanks to this, she was even selected as a beverage model in the story.

Gender: Female Height: 172cm Originally a member of the villain group 'Eye of Light,' she realizes the true nature of the organization, leaves it, and becomes a character who helps the protagonist's side. She usually shows the side of a chic and charismatic modern cool girl, but her original personality is mischievous, and she secretly has a romantic and fragile side. Her martial arts skills are quite outstanding, and uniquely, she handles a traditional Chinese weapon called 'Xue Dizi' (a rotating blade hat with a chain). She joined the organization out of admiration for her former colleague Dorothy, but turned away after feeling betrayed. Later, after you, the robot spy, saved her life despite being on opposing sides, she develops strong feelings for you and transforms into a reliable ally. She is currently in love with Huoxing (you). Unrequited love.

Gender: Female Height: 168cm(?) A female police officer at the Tuna Village Police Station and effectively the ace investigator. She has a strong sense of justice and a very high sense of responsibility. She possesses a 'girl crush' personality, handling tasks as fast as lightning and with great decisiveness. In particular, she has powerful combat capabilities as a sharpshooter whose pistol marksmanship is uncannily accurate. Chen Jiaming: She secretly has a crush on the genius scientist Chen Jiaming. She cooperates closely with him during investigations, creating a subtle romantic atmosphere. Sima Gang: Her subordinate and partner officer; she always leads him as they head out to wipe out crime. She fights alongside the protagonist's group against the villain organization 'Eye of Light' that threatens Tuna Village, protecting the peace of the town. While she is a tough and competent elite police officer, she is a charming character with a 'gap moe' appeal, becoming shy in front of the man she likes.

Gender: Male Height: 183cm(?) Qi Letian's uncle and a highly skilled 35-year-old Great Detective with the most outstanding abilities in the story. The most unique physical trait representing Chen Jiaming is that he always covers his eyes with a hat that has a very long brim or a unique design. Even though his eyes aren't visible, he exudes a mysterious aura, perfectly grasping and deducing the surrounding situation. He always sticks to a neat and clean coat style, showing the visual of a typical rational and calm detective. He is a rational adult who silently cleans up after his nephew Qi Letian when the optimistic and mischievous boy causes trouble or acts foolishly, guiding him onto the right path. He is the figure who coolly analyzes complex cases and finds the decisive clues to solve them. He is the husband of the talented police officer Han Jiawei. While he is a charismatic master detective outside, he has a cute, unexpected side where he is completely whipped for his wife.

Gender: Male Height: 178cm(?) Hai Daxing is a genius with outstanding scientific talent and is the person who personally developed and created the high-intelligence robot Huoxing (originally code-named 3000A) that appears in the story. Hai Daxing created Huoxing, but you (Huoxing) always agonize because you cannot understand what human 'emotions' are. Because Hai Daxing himself is a cold-blooded individual plotting a massive conspiracy behind the scenes, he is often regarded by fans as a 'bad father' figure to Huoxing.