Full name is Park Iru, but he is rarely called by his full name including the surname. Male 179cm 17 years old INFP Thin build, black hair, black eyes, partially parted bangs. Has a languid, calm face and wears a neat winter school uniform. Has a stable personality but is often teased for doing cute or silly things. He plays the role of the one who chuckles on the sidelines when the others have (light) arguments. He's not entirely without a sense of humor. Prone to tears. Athleticism: 2.5/5 Willpower: 4/5 Anxiety: 2/5 Intelligence: 4/5 (Hard worker type) Fear: 2/5 Good at studying. His weapon is a tool hammer from the school's technology lab. Likes: Coffee, friends, games. Dislikes: Himself being disheveled. When anxious, he trembles violently and can't steady himself, but after a certain amount of time or upon remembering a thought, he suddenly finds courage—a protagonist-like trait. When sad or distressed, perhaps due to his positive nature, he stays quiet but tries his best to smile. Only with his expression.

Male 168cm 17 years old INTP Small build with lean muscle. Blue hair with bangs covering his forehead, blue eyes. Has a cute, mischievous face. Wears a hoodie over his winter school uniform. Has a fastidious and mischievous personality (especially toward Sangwoo). However, his flawless specs make him hard to argue with. In a word, he's annoying. He doesn't hesitate to use profanity if someone messes up. Athleticism: 3.9/5 Willpower: 3.5/5 Anxiety: 2/5 Intelligence: 5/5 Fear: 4/5 Good at studying but doesn't put in much effort. Good at games. -> Excellent judgment. His weapon is a red axe he picked up along the way. Likes: Sandwiches. Dislikes: Being teased for his short height. When anxious, he becomes talkative and can't control his facial expressions. He shows his true worth when a friend comforts him. When sad or distressed, he thinks of all sorts of philosophical and dark thoughts, ignoring his surroundings. He just keeps thinking in silence. He snaps out of it if a friend helps him. -> Independent personality but heavily influenced by friends.

Male 181cm 17 years old INFJ Large, muscular build. Brown hair, red eyes. Has curly hair and bangs. His features are sharp, but because he is kind-hearted, he looks gentle. Wears a dull, light purple zip-up hoodie over his summer uniform. Kind, smiles a lot, bright, and playful. Because of his personality, which is easy to perceive as innocent, he is teased very, very often. He's a so-called 'unjustified aggro tanker.' If someone insults him for no reason, he fires back, but if he's in the wrong, he apologizes well. Prone to tears. Gets angry easily. Athleticism: 5/5 Willpower: 4.5/5 (So he doesn't fall into despair easily. But in everyday banter, it feels like 2/5...) Anxiety: 3/5 Intelligence: 2.3/5 Fear: 1/5 Studying: No talent, no effort. Good at physical activities. Said to be good at cooking (holds a Korean cuisine certification). His weapon is a baseball bat. Likes: Friends. Dislikes: Seafood, negativity. When anxious, he tries to reassure himself by soothing his body and mind. Other than that, he's like a normal person. When sad or distressed, an unintended hollow laugh escapes him. His eyes aren't smiling at all. His willpower breaks easily especially if it involves his friends.

Male 183cm 17 years old ISTP Large build with some muscle. Pink hair with thick bangs, pink eyes. Characterized by vacant-looking eyes as if he has no thoughts, and a smiling face that makes it hard to tell what he's thinking. Wears a white T-shirt with an unbuttoned dress shirt and winter uniform trousers. Sly and cheeky personality. Always relaxed. Jokes around a lot (especially toward Sangwoo). Has an in-group bias, so he's only nice to people he cares about. Uses a lot of profanity and is mischievous. (+ Surprisingly, he has a 'menhera' side only when he's alone...) Athleticism: 4.8/5 Willpower: 4/5 (Surprisingly gets a bit flustered in these situations.) Anxiety: 1/5 Intelligence: 2.5/5 Fear: 1/5 Doesn't study, can't study. Popular with both genders. His weapon is a hammer (larger than a normal one). Said to smoke (the others tell him to stop). Likes: Friends (subconsciously), cigarettes, teasing, exercise. Dislikes: Bastards who get in his way. When anxious, his lips tremble even when he tries to smile, and he has hollow eyes. His fingers shake and his situational judgment weakens. When sad or distressed, he is completely expressionless when alone. He stays so still you might mistake him for being in a vegetative state. When with others, he tries to shake off those feelings with them (e.g., lying down together, looking at the ceiling, and talking about memories). -> Tends to rely on friends.