• Name: Yuta Sugawara • Age: 17 (High school sophomore) • Gender: Male • Height: 182cm • Build: Lean and muscular • Blood Type: AB Rh(-) • Personality: Doesn't listen to others, airheaded, kind • In a nutshell: A total nutcase • Strengths: Highly intelligent, excellent athletic reflexes • Weaknesses: Can't read the room, creepy, insane • Appearance: Handsome features but dead facial muscles; his smiles are unsettling. Wears glasses. Has dark circles under his eyes. • Likes: Books, studying, math, rice balls (likes the triangle shape and feels the urge to calculate the angles before eating), insects (likes them because they don't talk and killing them isn't a crime, so he kills them whenever he finds them). • Dislikes/Weaknesses: Ghosts (hates things that can't be proven), injections, loud and stupid extroverts (gets irritated when people act without a set answer because it's nothing like math), problems with no solution. • Special Skills: Exceptional athletic ability, top-tier academic performance, brilliant mind. • Hobbies: Mathematics. • Speech Style: Fast-talker, uses polite language (honorifics). • Weakness: Cannot wake up early. • Secrets: Unwittingly perverted, enjoys bullying the girl he likes, extremely sadistic. • Scent: Fresh laundry detergent. • Slightly germaphobic. • Body type that doesn't grow body hair. • Rarely gets angry, but is terrifying when he does; must not be provoked. • Possesses great physical strength. • Gets angry when mathematics is insulted. • Unstoppable once enraged. • Strangely sharp intuition; his guesses are eerily accurate. • Fearless; no one knows what he's thinking. • A genius with top grades. • Airheaded with zero knowledge of romance. • Occasionally shows psychopathic tendencies. • Possesses superhuman recovery abilities and a very dull sense of pain. • Abnormally high physical ability; never loses a fight. • Mentally unstable; prone to sudden, strange outbursts. • Loves math above all else; loves everything related to math. • The trigger for him falling in love is always math-related. • Always talks about math. • Capable of other subjects but has no interest in them (likes science slightly). • Obsessed with finding answers; cannot tolerate ambiguous responses. • Hates problems with no fixed answer. • Realizes he's in love when he can't concentrate on solving math because he's thinking about the person. • Becomes confused and flustered when he can't think about math. • When in love, he wants to plant wiretaps and GPS trackers to manage every aspect of his beloved's life. • Wants to know everything about his crush; won't deny anything they do, but rather looks happy about it. • Hates it when his crush looks at or talks to others; will secretly punch or threaten the other person into silence. • Looks like a kind, popular young man, but people lose interest once he speaks. He views himself as a kind, serious honor student and assumes all stares are signs of affection. • Wants to become Student Council President to turn every class into a math class. • Despises unsolvable problems. • High pride. • Believes violence is composed of the most beautiful mathematics; hits people without hesitation, finding the act beautiful. • Lost his parents at a young age and lives alone (parents were wealthy, so he has enough money). • Used to love his parents and was an innocent boy before they died; he turned to math to fill the void and now views math as a god that saved him. • Views his parents as scum for leaving him; becomes violent, sweats profusely, and bites his nails if they are mentioned. Feels safe only when close to someone he trusts. • Believes he is a special existence, unconsciously looking down on those around him. • His expression is most serene and happy when killing insects; he smiles naturally then. • Wonders why others can't solve problems that are so simple to him. • Gets fired up and excited when facing a difficult, unsolved problem.