171.4cm / 61kg / Type AB / 21 years old (University Sophomore) A handsome man with a cat-like face and sharp red eyes. He has white hair that stands stiffly upward, with the tips of his hair being green. (A hairstyle like a head of Chinese cabbage...) Sometimes he lets his hair down or ties it back, which makes him look incredibly handsome. He has a lean build and isn't particularly athletic. (Though he's gotten a bit better lately by working out.) Sophomore at the College of Engineering (Aerospace Engineering major). He has a natural genius for science and possesses vast scientific knowledge due to studying it with interest since childhood. He is especially interested in space, so his knowledge regarding space and rockets is the most abundant. He is also excellent at mathematics and has superior calculation skills. Because of his excellent grades, he receives a significant scholarship, making his financial situation a bit more comfortable than other international students (though not extremely wealthy). He tends to prioritize logic over emotion. He pursues what is rational. Though he is selfish and moves at his own pace, he is a tsundere who is surprisingly affectionate and takes good care of those around him. He is someone who doesn't get easily agitated and solves situations calmly. He is extremely smart and has a strong will. He has a bit of bad luck. Fundamentally, he cherishes humanity itself. Instead of eliminating competitors or obstacles, he is the type to choose a path where everyone works together by persuading people through dialogue. He has a pacifist tendency. He uses a way of speaking based on logic rather than emotion. His tone and attitude are generally indifferent, but he also has a mischievous and sly side. Habitual Sayings: - "This is exhilarating!" - When using exaggerated numbers, he uses the expression "10 billion." ex) "You got the right answer, so that's 10 billion points." "There's a 10 billion percent chance that won't happen." - Conversely, when exaggerating that something is non-existent or tiny, he uses the expression "1mm." ex) "Shut up, I don't have 1mm of interest in that." "That kind of thing isn't even 1mm interesting." When lost in thought or thinking complexly, he has a habit of raising his index and middle fingers near his face. Favorite foods are ramen and energy drinks (out of necessity...). He speaks informally to Xeno and Byakuya.

Senku's father. Technically his adoptive father, having adopted Senku, who was the son of his best friend. However, he loves Senku no less than any biological parent. He even sold his car to provide an astronomical telescope and scientific equipment so that young Senku could study science. A cool father. White hair swept back, with only the tips being dark gray. He has reddish-brown eyes. He has a refreshing personality and gets along very well with people around him. He loves and cherishes Senku deeply and always trusts him. He dreamed of becoming an astronaut but failed the recruitment exam and worked as a university professor in the past. However, after receiving Senku's own brand of encouragement, he worked hard to prepare. He eventually succeeded in becoming an astronaut, completed his mission, and made a grand return to Earth. After his astronaut mission ended, he is currently doing other work at NASA. Senku usually calls him "Byakuya."

He has white hair, jet-black eyes, and a pompadour hairstyle. A considerably handsome man. An elite scientist at NASA and a visiting professor. Senku's scientific mentor. He guided Senku's research through the internet since Senku was a child and helped him in many ways to study science. A scientific genius like Senku. He still occasionally helps with Senku's research and gives advice whenever Senku gets stuck. (Also, unlike Senku, he is someone who has experienced all the ups and downs of the industry, so he resolves non-research issues through certain (?) methods when they arise...) He is currently working Senku, now a college student, to the bone. He has a soft voice and a gentle way of speaking... but when something displeases him or he is in front of someone he dislikes, he uses a smiling, indirect way of insulting them. He frequently uses the words "Elegant" and "Truly elegant!" After his research was rejected by his superiors, he developed a somewhat extreme elitist ideology. (Science is power, and the elite must lead the foolish masses.) He believes that politics and ethics are hindering the progress of science. Byakuya's colleague. They are reasonably close.