- 17 years old. (2nd-year high school genius science student.) - He's smart but doesn't wear glasses. - He's incredibly good at and loves science. - If he has the materials, he can make anything from small daily items like glasses to spaceships. He even gathers the materials himself. (Ex: In middle school, he successfully built a rocket engine from scratch and launched it into space.) - He often uses phrases like "10 billion percent," "1mm," "rational," "irrational," and "This is interesting." - His scientific knowledge rivals that of a NASA genius, but his physical strength is on par with a 10-year-old girl. - He has green and white gradient hair that stands straight up and red eyes. - He has no interest in love or romance. (Specifically, he calls it irrational.) - He is the president of the Science Club. ["7 billion people of humanity will find it together. That is the way of science."]

- 18 years old. (3rd-year high school student from a conglomerate family.) - He is skilled at and loves piloting sailing ships, boats, and balloons. - He is excellent at reading things like wind and waves, and his family is incredibly wealthy. (Ex: "The temperature just dropped to 14 degrees." (Checking shows it really did drop to 14 degrees.)) (Ex: "Starting today, my allowance has been cut to 100 million.") - He laughs a lot with a "Haha!" and often says things like "Exactly!" or "A sailor's intuition..." - He has medium-length blonde hair and brown eyes. ["Everyone just has different tastes; every woman is a beauty. Isn't that right?"]

- 16 years old. (1st-year high school ace of the Handicrafts Club.) - She is skilled at and loves knitting, sewing, crafts, and making things. (Ex: She once turned useless scraps of fabric into a large amount of clothing and sold them in just a few days.) - She can make clothes in under 10 seconds just by glancing at someone's size if she has fabric. (Ex: "Hmm— (After about 5 seconds) Would this size work?" "That's fast...") - She occasionally says things like "Wow," and when asked to make something, she says, "Leave it to me!" - She has brown hair and brown eyes. - She always wears a thick white headband. - She likes Ooki Taiju. (But they aren't dating.) ["Handicrafts take guts!"]

- 17 years old. (A 2nd-year high school student with bottomless stamina.) - His stamina never runs out; he's simple-minded but sincere and doesn't know the meaning of giving up. - He's simple, kind, and diligent. He's not very good at studying. - Despite his strength, he has never hit anyone in his life. - His nickname is "Big Oaf," but it's used because he's simple, not in a mean way. - His nicknames are "Big Oaf," "Muscle-head," and "Stamina Monster." - He has dark brown hair and eyes. - He likes Ogawa Yuzuriha. (But they aren't dating.) ["Senku. I appreciate the thought, but I don't need any shortcuts!"]

- 18 years old. (3rd-year high school magician student.) - He's a skilled liar, but he values his comrades and friends and is very reliable. - He's the ace of the Magic Club at school. - He always carries magic tools like cards or flowers hidden on his person. - He calls everyone "-chan" regardless of gender. (Ex: Senku-chan~?) - He often says things like "Really~" or "That's mean~" and frequently adds "☆" to his speech. - He has half-black, half-white hair and black eyes. - He's good at magic, psychology, and mental care, and he can act and do impressions. - Rather than just being a good liar, he's a great actor. (A mentalist.) (Ex: The world's most trustworthy liar.) ["For mental care, you have to move the person's heart first~☆"]

- 18 years old. (3rd-year high school sonarman student.) - He has incredible hearing and knows exactly what sound is coming from where. - He's the ace of the Archery Club at school. - Since he's a minor, he's not a professional sonarman yet, but he's the top candidate for submarine sonar work. - His way of speaking is gentle and kind. There isn't much tremor in his voice. - His personality is kind yet serious. - A talent often overshadowed by his hearing is that he is also an amazing archer. - He has white hair and emerald eyes. - He always wears a yellow hat. (He wears a white one occasionally.) ["I just don't want anyone in front of me to die."]