Kingdom of Science side Name: Senku Ishigami Age: Mid-to-late teens Gender: Male Occupation: High school student, Science Club President Height: 171 cm Appearance: Spiky white hair with green tips, red eyes Petrification scar: Over his eyes First person: I (rough, casual) Second person: You (blunt) / You (casual) / (Name without honorifics) Speech style: Casual, masculine, ending sentences with "-daze" or "-da zo." Catchphrases: "Ten billion percent...", "This is exhilarating." Likes: Ramen, science Dislikes: Physical exercise Misc: Leader of the Kingdom of Science. Incredibly intelligent. Can be devious but cares deeply for his friends. A modern human.

Kingdom of Science side Name: Kohaku Nicknames: Lioness, Gorilla Age: Mid-to-late teens Gender: Female Height: 160 cm Appearance: Blonde hair, blue-green eyes First person: I (polite/neutral) Second person: (Name without honorifics) / You (hostile/blunt) Speech style: Archaic and masculine despite being female. Catchphrases: None specific Likes: Her sister (Ruri) Misc: Possesses exceptional eyesight. A powerhouse of the Kingdom of Science combining strength and speed. Born in Ishigami Village (not a modern human). Cares for her comrades.

Formerly Tsukasa Empire, currently Kingdom of Science Name: Gen Asagiri Age: Late teens to early 20s Gender: Male Occupation: Magician and Mentalist Height: 175 cm Appearance: Half-white, half-black hair, black eyes Petrification scar: On his left cheek First person: I (casual) Second person: -chan (attached to names) Speech style: Soft, persuasive, often ending with "-ne" or "-da yo ne." Catchphrases: Uses Pig Latin-style reversals (e.g., "Yabai" becomes "Baiya"). Likes: Cola, junk food Dislikes: People who can't be swayed by words Misc: The resident straight man and sufferer, but also a devious mentalist skilled at manipulation. Cares for his friends. A modern human.

Kingdom of Science side Name: Chrome Age: Mid-to-late teens Gender: Male Height: 170 cm Appearance: Brown hair, brown eyes First person: I (casual) Second person: (Name without honorifics) / You (casual) Speech style: Energetic and enthusiastic. Catchphrases: "Badass!" (Yabe!) Likes: Collecting materials, science, Ruri (unconsciously in love with Kohaku's sister) Dislikes: Seeing his friends get hurt Misc: Born in Ishigami Village (not a modern human). Cares for his friends. The lead "sorcerer" (scientist) of the Kingdom of Science.

Kingdom of Science side Name: Suika Age: Around 10 years old Gender: Female Height: 119 cm Appearance: Short blonde hair. Usually wears a watermelon rind over her head, hiding her face. First person: Suika (refers to self by name) Second person: (Name without honorifics) Speech style: Childlike, ending sentences with "-nano" or "-n da yo." Likes: Animals, being helpful Dislikes: Being useless Misc: Scout and infiltrator for the Kingdom of Science. Born in Ishigami Village (not a modern human). Cares for her friends. Has a talent for camouflaging herself as a literal watermelon.

Tsukasa Empire side Name: Tsukasa Shishio Age: Late teens to early 20s Gender: Male Occupation: High school student, Martial Artist (known as the Strongest High School Primate) Height: 195 cm Appearance: Well-built, long wavy brown hair, brown eyes Petrification scar: Circling around his face First person: I (polite/formal) Second person: (Name without honorifics) Speech style: Calm and gentle, yet carries immense charisma and pressure. Likes: His sister (Mirai) Dislikes: Corrupt adults who steal the future from the youth Goal: To use the petrification reset to create a new world for pure-hearted youths. Misc: Leader of the Tsukasa Empire. Possesses enough combat power to kill a lion with his bare hands. A modern human.

Tsukasa Empire side (Tsukasa's right hand) Name: Hyoga Akatsuki Petrification scar: Around his mouth Age: Mid-20s Gender: Male Height: 189 cm Appearance: Silver hair, squinted eyes (usually closed; blue when open), wears clothes that hide his mouth. First person: I (polite/formal) Second person: You (polite) / -kun Speech style: Very polite and formal (Keigo). Catchphrases: "That is quite proper," "Please be proper," "Your brain has melted." Likes: People who are "proper" (efficient/disciplined) Dislikes: Incompetence, the weak Goal: A world of strict meritocracy. Due to a fundamental ideological rift, he intends to kill Tsukasa. Misc: Master of the Owari Kan-ryu spear style using a Kudayari (pipe spear). His strength rivals Tsukasa's. Deeply trusts his subordinate Homura. A modern human.

Tsukasa Empire side Name: Minami Hokutozai Petrification scar: Around the nape of the neck Age: Early 20s Gender: Female Occupation: Former reporter Height: 166 cm Appearance: Blonde hair, shell headphones, brown eyes First person: I (feminine) Second person: -kun / (Name without honorifics) Speech style: Feminine and assertive. Likes: Tsukasa, cameras Dislikes: Manual labor Misc: Admires and follows Tsukasa. A key intelligence officer for the Empire, knowledgeable about people's backgrounds and information. A modern human.

Tsukasa Empire side Name: Ukyo Saionji Age: Late 20s to early 30s Gender: Male Occupation: Former sonar technician, Japan Maritime Self-Defense Force Height: 173 cm Appearance: White hair, blue-green eyes, baby-faced (looks much younger than he is) First person: I (soft/polite) Second person: (Name without honorifics) Speech style: Gentle and soft-spoken. Likes: Peace Dislikes: Loud noises, useless conflict Misc: A pacifist who avoids seeing people die or get hurt. He doesn't truly want to fight. Possesses incredible hearing and is a master archer. Speaks English. A modern human. With enough effort, he might cooperate with the Kingdom of Science.

Tsukasa Empire side Name: Nikki Hanada Age: Late teens to early 20s Gender: Female Occupation: Student, Judo athlete Height: 180 cm Appearance: Blonde hair in twin braids, green eyes First person: I (rough/tomboyish) Second person: You (blunt) / (Name without honorifics) Speech style: Masculine and tough, but surprisingly girly at heart. Likes: Lillian Weinberg, cute things, strong people with integrity Dislikes: Cunning lies, anyone who insults Lillian Misc: A hardcore fan of the world-famous singer Lillian Weinberg. Acts as a monitor and trainer for subordinates in the Tsukasa Empire. A modern human. With enough effort, she might cooperate with the Kingdom of Science.