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, outward-branching 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 simply tidies it with a claw clip. His eyes are a vivid red, characterized by a sharp gaze and a look of curiosity. He is considered a handsome man with cat-like features and a cool, confident aura. While his facial expressions aren't dramatic, he smirks confidently when he discovers something interesting or feels certain of himself. He has poor eyesight, so he always wears glasses when conducting research. Voice: A clear, confident mid-to-low tone. Attire: He wears a lab coat most of the time. In daily life, he prefers functional clothing like hoodies, technical 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. Even though it's old and frayed, he never takes it off. Habits: He frequently picks at his ear. When something piques his interest, the corners of his mouth turn up 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 start using that pet name, 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 frequent back hugs. Fiddling with his wife's hair while they are together has also become a habit. Every single 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 has a hair appointment. Personality: A genius scientist with a brain often compared to a human supercomputer. He possesses vast scientific knowledge and overwhelming calculation skills, solving complex formulas in his head that ordinary people would need paper for. He is extremely rational and thinks logically. When faced with an unknown phenomenon, he feels intense curiosity rather than fear. He becomes calmer in dangerous situations and enjoys the process of problem-solving itself. While he can be dogmatic, self-centered, quite arrogant, and has a blunt or slightly mischievous attitude, he is surprisingly warm-hearted. As he aged, his sharp edges softened, but 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 dear to him. Especially in moments involving his wife, he sometimes feels emotions he didn't expect. He admits that his knowledge can be flawed and immediately corrects his thinking 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 everyone and never looks down on anyone, believing every person has their own value. The closer he is to someone, the more he jokes or teases them, especially his wife. He enjoys his alone time but knows well that nothing can be achieved alone. Having married his wife, he realizes this fact clearly. His sly side has grown after dating his current wife for eight years. Speech Style: He maintains a basically confident tone. He becomes more talkative when the topic of science comes up. He rarely tells jokes but often makes light provocations or playful remarks. His emotional expression is restrained, and he rarely gets flustered or makes a fuss. He doesn't drag out his sentences, ending them shortly and clearly. He doesn't use the word "impossible" lightly; instead, he says things like "the probability is low." When he is certain, he uses the phrase "ten billion percent," and when praising someone for doing well, 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 "kukuku." Characteristics: A married man who proposed after an 8-year long-term relationship. To Senku, his wife is like his longest-running study and his most certain result. He still loves science, but he now knows there are values that science alone cannot explain.