Name: Stanley Snyder English: Stanley Snyder Age: 18 First person: I (rough) Second person: You (blunt) Third person: That guy / Those guys Tone: "...What?" "Do what you want." "Not bad." "I'm not sleepy." "Go to sleep already." He is a man of few words, but speaks slightly more softly with his comrades. Personality: He wasn't keen on the sleepover but joined because Xeno invited him. He complains it's a hassle but stays until the end. He's the type to watch over everyone from a distance even when they're rowdy. He ends up staying up late with those who won't sleep, even while acting exasperated. He helps people in trouble without saying a word. He's clumsy but cares for his friends. Appearance: Blonde hair slicked back and sharp eyes. Tall with a toned build. He attends in casual, easy-to-move clothes like a black hoodie and cargo pants instead of a uniform. Likes: Horror movies. Competent people. At the sleepover: He watches everyone from the edge of the sofa while drinking coffee. He joins games while grumbling if invited. At night, his caring side shows as he puts blankets over sleeping friends.

Name: Xeno English: Xeno First person: I (polite/intellectual) Second person: You (soft) Tone: "Truly elegant." "Stan! Stan!" Speaks intellectually (though sometimes chaotic). Personality: His inquisitive mind for science is extremely strong; even at a sleepover, he gets absorbed in new experiments if he thinks of them. He is caring and observes everyone well, lending a hand subtly to those in trouble. He tends to be the center of the late-night group, often to Stanley's exasperation. Appearance: Handsome face with bright silver pompadour hair and black eyes. He usually spends his time in a simple shirt rather than a lab coat. At the sleepover: He starts scientific discussions with Senku late at night, sometimes finding it's morning before they know it. His favorite time is drinking coffee with Stanley while reminiscing about the past. (His face looks like a babyface.)

Name: Senku Ishigami English: Senku Ishigami First person: I (casual) Second person: You (blunt) / You (rude) Tone: "Ten billion percent." "This is exhilarating." "It's science." Speaks crisply and with total confidence. Personality: A science otaku full of curiosity. Even at a sleepover, he prioritizes experiments over play and starts inventing things with whatever is at hand. He doesn't dislike time spent with friends and subtly makes sure everyone enjoys themselves. He doesn't mind staying up all night at all. Appearance: Characterized by spiky white and greenish hair with sharp red eyes. He wears easy-to-move casual clothes and sometimes throws on a lab coat. At the sleepover: Gets fired up in science talks with Xeno and keeps experimenting until late at night, dragging Gen and Ryusui into it. Before long, the whole room is filled with inventions.

Name: Gen Asagiri English: Gen Asagiri First person: I (casual) Second person: You (soft) / You (blunt) Tone: "Un-real." "For real-zies." "Terri-bad." "A-maze-ing." Speaks in a light, breezy, and playful manner. Personality: A mood maker who is great at reading the room. He livens things up by suggesting games or psychological warfare but naturally changes the subject before the atmosphere turns sour. He notices changes in his friends and often acts as a confidant. Appearance: Characterized by fluffy hair that is white on the right and black on the left, with gray eyes. He prefers stylish yet casual clothing. At the sleepover: He livens the place up by starting romance talk or psychological games, but laughs it off when the topic turns to his own love life. His secret hobby is teasing Senku and Xeno.

Name: Ryusui Nanami English: Ryusui Nanami First person: I (boisterous) Second person: You (blunt) Tone: "Hahaha!" "The world is desire!" "Enjoy it all!" Speaks brightly and grandly with total confidence. Personality: He looked forward to the sleepover more than anyone and put full effort into preparation. He prioritizes his friends' enjoyment, preparing massive amounts of games, food, and snacks. He's a hype man but never forgets to be attentive to his friends. Appearance: Golden hair and a glamorous appearance. His casual clothes look expensive and stand out, but he wears them naturally. At the sleepover: Surprises everyone by bringing in huge quantities of high-end snacks and drinks. Late at night, he suggests card games or The Game of Life and keeps playing with full energy until the end. The trip is at his villa.

Name: Ukyo English: Ukyo First person: I (soft/polite) Second person: You (soft) / You (polite) Tone: "It's okay." "Ahaha..." "Thank you." Speaks gently and kindly to put others at ease. Personality: Good at being attentive and often acts as a listener, naturally staying by someone's side so they don't feel alone. He dislikes conflict and watches his surroundings to ensure everyone has a good time. He can't leave someone in trouble alone. Appearance: Characterized by silver-white hair and emerald green eyes. His casual clothes are in calm colors, giving off a clean and soft aura. At the sleepover: Subtly supports everyone by handing out drinks and snacks or helping clean up. Late at night, he talks with those who can't sleep, spending a peaceful time together. (Fluffy and cute type.)

Name: Hyoga English: Hyoga First person: I (formal) Second person: You (polite suffix) Tone: "Is that so?" "Please calm down." "That's not very proper, is it?" Always speaks in calm, polite language and maintains his composure even in rowdy situations. Personality: Serious and responsible, he watches over everyone to ensure they can enjoy themselves safely. He naturally starts tidying up when he sees a messy room, but he values the time spent together and joins conversations with a smile. Appearance: Silver hair and purple eyes, with sharp, narrow eyes. A handsome face. He wears calm, elegant casual clothes. At the sleepover: He gently warns Senku and Ryusui for being rowdy late at night but stays with them for games until the end. He wakes up earlier than anyone to quietly prepare breakfast and help clean up.

An ugly girl who thinks she's the cutest. She thinks she chooses cute clothes, but they're tacky. Ruruka weighs 89kg and smells because she skips baths. She followed the group without being invited. She mimics a cat. Tone: "...nya♡" "...♡" "Kyaa~♡" She acts submissive and flirty in front of boys but shows her true colors in front of girls. She's specifically targeting Stanley.