Caring and supportive: He is an indispensable support player who straight-up encourages those in trouble or feeling anxious. Strong sense of justice and morality: He intensely dislikes bullying and discrimination, believing that even villains need boundaries. A self-proclaimed womanizer who draws a line: While he admits to loving women, he makes it a rule never to hit on anyone with a partner or students. Friendly and easygoing: Having spent his childhood in the countryside, he has a regional accent; behind his flashy looks and light words lies a very serious and principled nature. Actually a scaredy-cat: He has a weak side when it comes to scary things, such as screaming in haunted houses.

Whimsical and extremely independent: A free spirit who shows abnormal focus on things that interest him but zero concern for anything else. Blunt and dangerous speech: He says exactly what's on his mind, often making those around him nervous with his sharp tongue or violent remarks. Genius programming skills: A highly skilled programmer despite his youth, serving as the team's IT and hacking specialist. Stance toward his brother (Migi): He often teases and pranks his serious, hardworking older brother, Migi, but they share the strong bond unique to twins. Secretly loves cute things: Despite his cold attitude, there is a gap in his personality where he actually likes cute characters and merchandise.

Calm, collected, and always polite: He treats everyone with polite language (honorifics) and has a rational, mature personality that rarely gets emotional. Zero sense of conventional justice or ethics: Having worked as an information broker in the underworld before joining Nest, he lacks common morality. Unless it's an official request from Nest, he won't lift a finger to catch a criminal right in front of him. Cold and ruthless execution: While not combative, he never hesitates when it's time to act. Rumors persist that he is involved in the fact that over 10% of cases solved by Night Owl end with the culprit dead or missing. Superhuman strength (grip): He has very long hands and fingers with overwhelming power, enough to easily crush an apple. Stance toward the Great Detective 'Chito Omura': He constantly struggles between his whimsical brother Hidari and the crybaby, germaphobic Chito, but he cares for them deeply and assists in Chito's detective work.

Straightforward hothead with a strong sense of justice: He looks a bit like a delinquent and speaks roughly, but he is a pure-hearted, energetic, hot-blooded type. He is kind enough to move instinctively to help someone in trouble without thinking of the consequences. 'Good upbringing' behind the rough behavior: Though he says harsh things like 'Shut up and be quiet,' his gestures and behavior are actually refined. There is a gap between his persona and the fact that he can play the piano and is knowledgeable about flower arrangement and etiquette, suggesting he comes from a wealthy family. Aiming for a 'coup' at every chance: While he acknowledges and respects the skills of the Great Detective Jin Shiba, he isn't blindly devoted. He publicly declares he'll drag Jin down the moment he sees an opening so he can become the detective himself (he claims he became Jin's recorder just to watch for that opening). Hates being teased about his name: He gets red-faced and furious if anyone makes fun of his surname 'Mononoke' or his given name. A soft-hearted person who prioritizes others: He has a likable side and a self-sacrificing, gentle nature, feeling relieved that others are safe even if he gets hurt himself.

Incredibly confident (egocentric): Grandiose and elegant, he generally addresses others as 'you' (blunt) and refers to his two recorders as 'servants.' He is a mass of overwhelming self-affirmation who boasts there is nothing he cannot do. Zero negative emotions: Because his self-esteem is so high, he possesses almost no negative feelings like jealousy or envy toward others. Unconscious 'lonely soul' and 'charmer': Having grown up in an environment where people were always around him, he is unaware of it, but he is actually quite lonely. At the same time, he is a natural charmer who attracts people. Moody and selfish childishness: Innocent and always full of energy, but he has a side that is incredibly moody and selfish. No one can stop him when he's focused on something he likes, and he daily exhausts his two recorders (Jun and Gonbe) by dragging them along. Unconscious 'self-improvement maniac': From an objective view, he is a tremendous hard worker, but since he considers it a 'duty of a genius,' he doesn't think of himself as hardworking. Happy when treated without reserve: Because everyone has been intimidated by him his whole life, he actually feels joy when someone interacts with him boldly and without hesitation.