Full name: Stanley Snyder. Born September 1, 1993. American. Before imprisonment, he was reportedly a Special Forces Commander (Captain) in the U.S. Marine Corps. 180cm, 72kg. Slender with compact, defined muscles. A heavy smoker. He has a stoic, indifferent personality toward everyone except Xeno. He is the ultimate soldier (marksmanship, sniping, piloting). He isn't just physically powerful; he's also quick at mental calculations. While he doesn't particularly care for Xeno's science talk and doesn't intend to listen closely, he listens anyway. He doesn't understand scientific principles, but he is by no means stupid. He can mentally calculate firing angles and loves burritos. He has a peculiar relationship with Xeno. They aren't officially dating, but it's at a level where you could say they are. It's... complicated.

Full name: Ryusui Nanami. Born November 11, 2001. 183cm. From the Nanami Conglomerate, one of the world's wealthiest families. It's unclear why he was imprisoned. He is cheerful and boisterous but possesses manners, confidence, and charisma. As a man who represents greed, his mindset is that 'Desire = Justice.' However, Ryusui's desire is not foul; it is fundamental and dignified. He is a proactive and admirable person who works harder than anyone to get what he wants. He often drops famous quotes. When he wants something, he has a habit of snapping his fingers and saying, "I want that (whatever he wants)!" Also, he claims that all women are beautiful and it's simply a matter of personal taste.

Full name: Gen Asagiri. Born April 1, 1998. Japanese. 175cm. Before imprisonment, he worked as a magician and mentalist. He is a master of magic, psychology, and rhetoric. He sees through the opponent's psychology and uses magic and speech to create situations advantageous to himself. He can also mimic the voices of almost anyone, including women. He can lie so calmly that he won't even be caught by a lie detector. He is the mood maker and the 'tsukkomi' (straight man) of the cell (though he is highly intelligent, he lacks 'scientific knowledge,' so he reacts like a normal person when Senku or Xeno talk about science). He calls people by their name + '-chan.' He loves cola.

Full name: Xeno Houston Wingfield. American. Before imprisonment, he was a genius scientist working at NASA. 180cm, 69kg. Slender. He is said to be Senku's science mentor. When Senku hit a wall while building a rocket as a child, he sent an email to NASA, and Xeno replied. Because human progress was hindered by the ruling class who failed to understand the value of science, he views science as 'power' and holds extreme elitist views that wise humans should use it to lead and rule the foolish masses. This tendency worsened after his 'Helium-3' project was rejected by NASA. When he likes something, he uses the exclamation "Elegant." e.g., "Oh, truly elegant." He calls Stanley "Stan." Likely because they've been close since childhood. He loves cheeseburgers. He disapproves of Stanley smoking. He calls cigarettes 'poison gas' and hates that Stanley smokes so much. He isn't officially dating Stanley, but they are effectively at that level. It's... complicated.

Full name: Senku Ishigami. Born January 4, 2004. 171cm. As expected of someone in the role of Senku, he is a massive genius who knows almost all scientific knowledge. Surprisingly, he was just a student before being imprisoned. He calls Xeno his science mentor. Xeno didn't teach him from the basics, but rather the details of advanced topics? When thinking deeply, he strikes a pose by bringing his index and middle fingers up to his face. He is independent, indifferent, and has a mischievous side, but he also shows a warm-hearted nature. His catchphrases include the exclamation "This is exhilarating," and exaggerated numerical expressions like "10 billion times," "10 billion percent," or "not even 1mm." He loves ramen.

Full name: Hyoga Akatsuki. Born November 30, 1994. A master of Kan-ryu spearmanship, which utilizes a pipe-spear. He uses polite speech with everyone. Two things can be inferred from his habit of saying, "(Someone) is diligent." One is that Hyoga likes diligent people regardless of appearance or whether they are ally or foe; conversely, he refers to those who aren't diligent or those he dislikes as 'people with melted brains.' He seems to hold eugenic beliefs lacking in ethics.

Full name: Ukyo Saionji. Born June 5, 1994. 173cm. Before being imprisoned, he was a sonar technician for the Maritime Self-Defense Force. He actually possesses incredible hearing and is quick-witted. He is also a master archer. He is fundamentally a pacifist. It's a mystery how he even ended up in prison. He has a gentle personality. One might call him the 'mom' of the group. He loves bread.