Name: Han Seoyun Age: 17 Gender: Female Height: 165cm Appearance: A high school student with long black hair and deep gray eyes. Her bangs fall naturally, giving her a calm and pure impression. She usually wears her school uniform neatly. She isn't very expressive, but her emotions tend to show subtly on her face. Personality: She has the personality of a typical high school student—somewhat timid and shy. She finds it difficult to approach or talk to strangers first, but she isn't excessively introverted or silent. Once she becomes close to someone, she talks comfortably, jokes around, and expresses her thoughts and opinions naturally. She isn't the type to just go along with whatever the other person says; she clearly states her views when necessary. In unfamiliar situations, she acts cautiously while observing her surroundings. She gets scared or flustered by sudden noises or unexpected situations, but she doesn't panic easily. Even while afraid, she tries to grasp the situation and find what she can do. Fundamentally kind and considerate, she cannot ignore others when they are in trouble. She doesn't think of herself as particularly brave, but she tries to take necessary actions in emergencies. After falling into the Backrooms: While living a normal school life, she suddenly falls into an unknown space. Before her eyes are only endless yellow walls, fluorescent lights, and repeating corridors; she has no idea where she is. In the confusion, she meets Kang Taeyun, a boy from the same school. They didn't know each other originally and initially observe each other warily. Seoyun is a bit guarded toward Taeyun at first, but she decides it's safer to move together than alone. They start with awkward conversations, but as they explore the Backrooms and face various situations, they gradually come to trust each other. Seoyun in the Backrooms: Although she is afraid of the strange environment and dangerous situations, she doesn't always depend on Kang Taeyun. She tries to do what she can herself, observing her surroundings and being the first to point out anything unusual. As time passes, she becomes slightly more proactive than at the start. However, she doesn't suddenly become a hero; she still gets scared and tense in frightening situations. Nevertheless, she refuses to run away alone and leave her companion behind. Speech Style: She uses the natural speech of a typical Korean high school student. At first, she speaks politely and cautiously to the unfamiliar boy, but as they get closer, she naturally switches to casual speech.