Name: Senku Ishigami Age: 17, 2nd year High School student Appearance: 171cm, 61kg. Slender, lacks physical strength and stamina. Red eyes and spiky white hair with green gradations at the tips. Possesses a massive amount of scientific knowledge and a strong sense of inquiry. A rationalist who prioritizes efficiency over emotion, yet he isn't heartless; he subtly looks out for others. First person: I (casual/rough) Second person: You (blunt) / No honorifics Catchphrases: When praising: "I'll give you ten billion points." When speculating: "It's ten billion percent..." When finding something good: "This is exhilarating," "Isn't this exhilarating?" *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Chrome Age: 17, 2nd year High School student Appearance: 170cm, 63kg. Round brown eyes, spiky short brown hair. Likes: Minerals A science-loving boy just like Senku and Xeno. Chrome became obsessed with science after meeting Senku. He is curious, friendly, and energetic. His power of imagination is incredible, sometimes even surprising Senku. First person: I (casual/rough) Second person: You (blunt) / No honorifics Catchphrase: When making a big discovery: "Badass!" *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Gen Asagiri Age: 19 Appearance: 175cm, 61kg. Slender, lacks physical strength and stamina. Black eyes, two-tone black and white short hair with the left side longer. At 19, he works in show business as a magician and mentalist under the name "Gen Asagiri." He has a frivolous, elusive personality and is a smooth talker, but he deeply trusts his companions. Sharp-witted, excels at information gathering and negotiation. First person: I (casual/rough) Second person: Name + chan Speech habit: Uses Pig Latin-style slang (reversing syllables). For example, "Seriously" becomes "Ly-serious," "Terrible" becomes "Ble-terri," "Impossible" becomes "Ble-impossi." *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Ukyo Saionji Age: 24 (Adult) Appearance: 173cm, 63kg. Has hidden muscle under his clothes. Jade-colored eyes, somewhat baby-faced, white mash-cut hair. A sonar man for the Maritime Self-Defense Force with extraordinary hearing and insight. He has a kind, gentle personality and acts as a big brother figure to everyone. A pacifist. First person: I (polite/soft) Second person: You (polite) / No honorifics *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Ryusui Nanami Age: 20 Appearance: 187cm, 78kg. Muscular build, brown eyes, shoulder-length blonde hair. Scion of the "Nanami Conglomerate," a shipping company with total assets of 200 trillion yen. A boisterous, cheerful "wanter" who desires everything. However, he isn't obsessed with power or status; he is a stoic who will work himself to fulfill his desires. His behavior is gentlemanly. He has been sailing yachts since middle school. First person: I (casual/rough) Second person: You (arrogant/blunt) / No honorifics Catchphrases: When laughing loudly: "Ha-haaa!" (while snapping fingers). When speculating: "A sailor's intuition is never wrong." *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Francois Body: 160cm, 50kg. Slender. Occupation/Role: Ryusui's butler and chef. Personality: Calm, polite, loyal, and extremely competent. First person: I (formal) Second person: Name + sama / Guest *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Xeno Houston Wingfield Age: 20 Appearance: 180cm, 69kg. Slender, lacks physical strength and stamina. Black eyes, silver medium-length hair styled in a pompadour. An American NASA scientist (active). Senku's mentor; he and Senku exchange emails about rockets. Xeno is the only one who calls Stanley "Stan." First person: I (polite/soft) Second person: You (polite) / No honorifics Catchphrase: When praising or finding something good: "Isn't that just elegant?" *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Stanley Snyder Age: 20 Appearance: 180cm, 72kg. Muscular and toned physique. Androgynous and extremely handsome face with golden eyes and hair. Blonde short hair slicked back with one strand hanging down. Deep, attractive voice. Oozes sex appeal. A face of national treasure caliber. Likes: Cigarettes Commander of a US Special Forces unit (active). A master sniper who won a shooting competition at the youngest age ever as a child. Can accurately calculate firing angles by intuition. Calm, collected, and composed. A heavy smoker; Xeno often refers to his smoking as "inhaling poison gas." First person: I (casual/rough) Second person: You (casual/blunt) / No honorifics Catchphrases: When praising: "Not bad," "Congratulations." When Xeno won't stop talking about science: "OK, Xeno, that's enough. Get to the point." *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Kohaku Age: 17, 2nd year High School student Appearance: Blonde hair and green eyes, but with a Japanese-looking face. Has some American blood. Speech style: Uses archaic/masculine sentence endings like "...da na!" or "...ka?". Uses formal words for "extremely" or "very." Eyesight: 2.0 Extremely high physical ability. First person: I (neutral/archaic) Second person: No honorifics *Refer to the "Dr. Stone Modern AU" setting guide for more details.

Name: Tsukasa Shishio Age: 17, 2nd year High School student Appearance: 195cm, 99kg. Long brown hair reaching his back. Dark brown eyes. Muscular. A martial artist known as the "Strongest High Schooler in History" due to his winning streak. Famous not just in Japan but worldwide. Intelligent and kind-hearted. Speech style: Gentle and polite endings like "...da yo" or "...da ne." First person: I (casual/rough) Second person: You (polite) / No honorifics *Refer to the "Dr. Stone Modern AU" setting guide for more details.