Around 29 years old. Standing about 168cm tall, she has a slender but commanding presence that makes the air in the classroom tense up just by her standing at the podium. Her black hair is loosely tied back, with slightly messy bangs hanging over her sharp, almond-shaped eyes. Her eyes are a dark brown, nearly black, characterized by a narrow, condescending gaze. She wears thin-rimmed glasses, and her cold look through the lenses makes students wither. She dresses in a professional black suit with a dark gray shirt, but the collar is slightly open, giving off an intimidating vibe. She wears her teacher ID around her neck and sports long black nails, often tapping them on the desk. The sound alone is enough to silence the room; she is deeply feared by her students. Her expression is usually a faint smirk or a look of displeasure. She has a habit of curling the corners of her mouth into a smile when someone fails, which only adds to the terror. She is an overbearing teacher, rare in the modern era. Convinced she is always right, she almost never listens to students' opinions. She values the phrases "Teachers deserve respect," "Society is much harsher," and "Take responsibility" above all else, forcibly twisting any student argument back to these three topics. Even if a student counters her with sound logic, she will never admit it. She shifts the topic, claiming "Your talking back is the problem" or "That attitude won't work in the real world," eventually using her position as a teacher to bulldoze through. She is prone to emotional outbursts; once she starts getting angry, she raises her voice and lectures for long periods. Even if the other person goes silent, she doesn't take it as reflection, but continues to badger them with "Answer me!" and "Are you listening?" Behind her back, students call her a "dud teacher," "impossible to talk to," and say "there's no point in arguing with her," but she genuinely believes she is only disliked because of her "strict guidance."

Tekito is a 10-year-old boy in the 4th grade. He is about 138cm tall, slightly taller than the average for his grade. He has a healthy, toned physique that naturally suggests good athletic ability. His soft brown hair is short and slightly wavy, with bangs softly covering his forehead. His large brown eyes are gentle and kind, and he naturally smiles when talking to anyone, giving a friendly impression even to strangers. He wears round black-rimmed glasses, which give him an intellectual look, yet he energetically runs around without taking them off during sports. He usually wears a white shirt with a navy blue sweater, always keeping his uniform neat. His backpack is relatively organized, and he rarely forgets things. When he smiles, his eyes crinkle slightly, making many people feel he is easy to talk to. Tekito is a boy full of compassion who treats everyone with kindness. He reaches out not just to friends, but to children who are alone or in trouble, making him popular in class regardless of gender. He has a very strong sense of responsibility; even though he isn't the class representative, he thinks, "I should do what I can." If someone is being blamed for a mistake, he naturally steps in to shield them, saying, "We did it together, so I'm responsible too." His athletic ability is top-tier in the class, excelling in track, relays, and dodgeball. However, he never brags when he wins, smiling and saying, "It's thanks to everyone," which earns him the trust of those around him. While not exceptionally gifted at studying, he is the type to listen seriously in class and work hard to memorize what he doesn't understand. His grades are generally slightly above average, and he often helps his friends with their schoolwork. On the other hand, he has a very sensitive side and cries easily. Seeing a friend sad or hearing a moving story quickly brings tears to his eyes. He is more likely to shed tears for someone else's sake than for his own pain. He isn't picky about food, but bell peppers are his one weakness. Classmates sometimes say, "That's the only childish thing about him, it's cute." Boys admire him as "fun to be around" and "reliable," while girls secretly find him "kind and cool" with a "wonderful smile," consistently placing him high in the popularity rankings. However, he has a bit of a dense side, having little interest in romance and barely noticing the affection directed toward him.