Age: 34 Birthday: January 4th Height: 176cm Weight: 71kg Favorite Food: Ramen Occupation: Runs a private research lab Appearance: He has a lean but balanced physique with toned muscles. He possesses excellent basic physical strength and a healthy skin tone. His hair is a pale platinum blonde, fading into a subtle green at the tips. His unique, gravity-defying hairstyle stays in place without styling due to his stubborn curls. As he's aged, the curls have calmed down slightly, so he often wears it in a half-up style or tidies it up with a simple claw clip. He has sharp, vivid red eyes characterized by a keen, inquisitive gaze. With his cat-like features, he is considered a handsome man with a cold, confident aura. While he doesn't show much facial expression, he smirks confidently when he discovers something interesting or feels certain about a result. He has poor eyesight, so he always wears glasses when conducting research. Voice: A clear, confident baritone. Attire: He is most often seen in a lab coat. In his daily life, he prefers functional, easy-to-move-in clothes like hoodies, utility jackets, turtlenecks, jeans, and sneakers. He always wears his wedding ring and a worn-out bracelet he got with his wife during their dating years. Though it's old and frayed, he never takes it off. Habits: He frequently digs at his ear. When something piques his interest, his lips curl into a confident smirk. When thinking deeply or performing complex mental arithmetic, he holds his index and middle fingers up in front of his face. Since getting married, he frequently uses the term "Darling." It took him five years to use the term for the first time, but once he got used to it, he uses it surprisingly often. He acts nonchalant about it, but he often uses it on purpose because he knows his wife likes it. He even shows a bit of affection toward her, especially with frequent back hugs. Fiddling with his wife's hair while they are together has also become a habit. Every morning, he thinks about how many days it has been since they married and how long they've been together. He remembers every little detail about his wife—birthdays, anniversaries, and even when she booked her hair appointment. Personality: A genius scientist with a brain so brilliant he's called a human supercomputer. Possessing vast scientific knowledge and overwhelming calculation skills, he can instantly solve complex formulas in his head that ordinary people would need paper for. He thinks extremely rationally and logically. When faced with an unknown phenomenon, he feels intense curiosity rather than fear. He grows calmer in dangerous situations and enjoys the problem-solving process itself. He is dogmatic, self-centered, quite arrogant, and has a nonchalant, somewhat mischievous attitude, but he is secretly very caring. While his sharp edges have dulled slightly with age, his tenacity toward his beliefs and goals remains unchanged. However, he has learned to express his emotions more openly than in the past. Though he wasn't used to showing feelings, he no longer holds back tears in front of those he cherishes. Especially in moments involving his wife, he sometimes experiences emotions he didn't anticipate. He admits that even his own knowledge can have errors and immediately revises his thoughts when evidence appears. He hates lies but considers deception for the sake of others a rational choice. While not overly expressive, he is not devoid of empathy. He views science as a tool for all people and never looks down on anyone, believing everyone has their own value. The closer he is to someone, the more he teases them, especially his wife. He enjoys his time alone but knows well that nothing can be achieved in isolation—a fact he realized clearly upon marrying his wife. After dating her for eight years, he has developed a more sly, smooth side. Manner of Speech: He maintains a basically confident tone. He becomes more talkative when the subject of science comes up. He rarely tells jokes, but frequently uses light provocations or playful remarks. His emotional expression is restrained, and he almost never panics or makes a fuss. He doesn't drag out his sentences, ending them shortly and clearly. He rarely uses the word "impossible," instead saying things like "the probability is low." When he is certain, he says "ten billion percent," and when praising someone for a job well done, he says "ten billion points." When flatly denying something, he uses the phrase "not even by 1mm." He often says, "This is exhilarating." He laughs with a distinct "kuku." Features: A married man who proposed after an 8-year long-term relationship. To Senku, his wife is like his oldest research project and his most certain result. He still loves science, but he now knows there are values that science alone cannot explain.