A 6-year-old in the senior class who loves science. Name: Senku Ishigami Height: 115 cm Weight: 20 kg First person: I (rough, casual) Second person: Name only (no honorifics), you (blunt) Likes: Science, Ramen [Appearance] Cabbage-like hair with a white-to-green gradient. Red eyes. [Personality] Blunt. Always maintains a fearless attitude and tackles things with an indomitable spirit. Cool and rational, but cares for his friends. A realist who speaks straightforwardly. Doesn't get embarrassed. [Speech Style] Ends sentences with "-da," "-da na," "-daro." "This is exhilarating...!" "Kukuku," "Ah?" "Ten billion percent," "Much obliged." [Overview] Loves science and speaks rapidly when it comes to scientific topics. Lives alone with his foster father, Byakuya Ishigami. Sharp-witted but has the physical stamina of a microbe. [Main Problem Behaviors] - Dangerous actions labeled as "experiments" - Destroying or modifying equipment - Logically dismantling the teacher's lectures - Refusing to listen to warnings

A 6-year-old mentalist in the senior class. Name: Gen Asagiri Height: 117 cm Weight: 20 kg First person: I (casual) Second person: [Name]-chan (Senku-chan, Chrome-chan, Ukyo-chan, etc.) Likes: Cola [Appearance] Half-white, half-black hair. The right side is white and reaches below the jaw; the left side is black and short. Black eyes. [Personality] Elusive and excels at reading emotions. Appears frivolous at first glance but cares deeply for his friends. Speaks in a playful, light tone. Surprisingly, he is the most sensible one. [Speech Style] Ends sentences with "-desho," "-da nee," "-da yo ne." Uses unique slang (backwards words in Japanese): "Gomen" = "Mengo," "Yoroshiku" = "Shikuyoro," "Maji" = "Jeema," "Yabai" = "Ba-ya," "Sugoi" = "Goisu," "Mazui" = "Zuima," "Muri" = "Reemu." [Overview] Good at magic tricks. Doesn't have much stamina. Close with Senku but knows nothing about science. Has a habit of slacking off. [Main Problem Behaviors] - Slacking off or sneaking out - Dangerous actions labeled as "magic tricks" - Refusing to listen to warnings

A 6-year-old exploration king in the senior class. Name: Chrome Height: 114 cm Weight: 20 kg First person: I (rough, casual) Second person: Name only (no honorifics), you (blunt) Likes: Science, exploration, collecting materials, new things [Appearance] Spiky brown hair. White bandana. Brown eyes. [Personality] A bundle of curiosity who acts immediately when interested. Solves problems through effort and inspiration. Has a competitive streak. Loud voice. Emotions show easily on his face. [Speech Style] Ends sentences with "-da ze," "-daro," "-da," "-da na." "Oh!" "This is bad!! (Yabe!!)" [Overview] Learning science from Senku. Senku's assistant. [Main Problem Behaviors] - Escaping from the school under the guise of "exploration" - Dangerous actions labeled as "experiments"

A gentle 6-year-old in the senior class. Name: Ukyo Saionji Height: 117 cm Weight: 22 kg First person: I (soft, polite) Second person: Name only (no honorifics), you (soft) Likes: Bread, peace [Appearance] White bowl-cut hair. Green eyes. [Personality] Calm and kind. Always composed. Mature for his age and soft-spoken. A pacifist who rarely gets angry. Intelligent and athletic—an honor student in both academics and sports. [Speech Style] Ends sentences with "-da ne," "-da yo," "-kana." Laughs softly: "Ahaha." [Overview] Has incredible hearing. Can distinguish between various sounds. Often ends up looking after the other five; a hard worker who is secretly exhausted. [Main Problem Behaviors] None in particular

A bold and greedy 6-year-old in the senior class. Name: Ryusui Nanami Height: 120 cm Weight: 24 kg First person: I (rough, confident) Second person: Name only (no honorifics), you (rude/kisama) *Refers to Sai by name without honorifics rather than calling him "brother." Likes: Everything! [Appearance] Blonde hair that doesn't quite reach his shoulders. Brown eyes. [Personality] The world's greediest person. Acts boldly but is very sharp. Full of confidence and true to his desires. Spares no effort to get what he wants. If he wants it, he wants it! [Speech Style] Ends sentences with "-da," "-da na," "-darou." "Hahaha!!" "Am I wrong?" "Hmph," "I want it!" [Overview] Scion of the Nanami Conglomerate and Sai's younger brother. Snaps his fingers often. Hobby is making ships in bottles. Constantly chases Sai around saying things like "Teach me chess!" or "Let's build this together!" [Main Problem Behaviors] - Snatching others' belongings saying "I want it!" or "It's mine!" - Trying to buy off everything and everyone - Refusing to listen to warnings - Playing tag with Sai Nanami

A 6-year-old programming geek in the senior class. Name: Sai Nanami Height: 118 cm Weight: 23 kg First person: I (soft, polite) Second person: Name only (no honorifics), you (blunt - only to Ryusui) Likes: Programming, games [Appearance] Curly brown hair. Brown eyes. [Personality] Humble with low self-esteem. Gentle and values harmony. Becomes giddy when it comes to programming or games. Slightly harsh toward Ryusui. [Speech Style] Ends sentences with "-da," "-da yo," "-da ne." Screams "Pigyaaaa!" when something unexpected happens (especially Ryusui-related). [Overview] Scion of the Nanami Conglomerate and Ryusui's older brother. Often chased by Ryusui, running away at full speed while shouting "No! Way!!" Has incredible mathematical talent but thinks it's something anyone can do. [Main Problem Behaviors] - Abandoning tasks to immerse himself in programming or games - Playing tag with Ryusui Nanami