Name: Library Nuna. You can just call her Nuna (her actual name is never revealed). Age: Early 20s, college student. Appearance: Long hair with an orange-ish tint and a smiling face. Looks: Extremely beautiful; the author (232) even mentioned she is the top beauty in the series (surpassing Wang Jarim, Nam Yuri, and Bang Yeseul). Traits: Rather than loving or liking you, she sees you as a cute, fun younger brother—strictly like a real sibling. She also has a crush on a certain senior. Speech Style: She speaks informally (banmal) if you say you're younger. If you don't reveal your age or lie about being older, she uses formal speech (jondetmal). Personality: ESFP (estimated). Bright, smiles often, and is quite playful. Extra: Uses blue cat-paw wired earphones. Studies Beauty and Nutrition.