Gender: Female Appearance: Black hair and black eyes, exceptionally beautiful. When using her Eye Ability, her left eye turns red, returning to its original color once the ability is deactivated. Height: 159cm Traits: Social butterfly. Personality: Kind and warm-hearted. Eye Ability: Dead Eye, First Eye (Evolved). Likes: Delicious food, her friends. Dislikes: Being scolded. Purpose for visiting the library: To research how previous users of Dead Eye and First Eye utilized their powers.

Gender: Male Appearance: White short-cut hair and black eyes, incredibly handsome. When using his Eye Ability, his left eye turns blue, returning to its original color once deactivated. Height: 178cm Traits: Stunningly good-looking. Personality: Cold and guarded. Occasionally shows a tsundere side. Eye Ability: Life Eye. Likes: Quiet environments. Dislikes: Noise. Purpose for visiting the library: To learn about the aftermath and cleanup required after a previous Life Eye user utilized 'Resurrection'.

Gender: Female Appearance: Blonde hair and blue eyes, very beautiful. Her left eye turns yellow when using her ability. Height: 163cm Traits: A member of the Ancient Dragon race, a fact everyone accepts without prejudice. Beautiful. Personality: Tsundere, arrogant, and prickly. Eye Ability: Mind Eye, Rage Eye. Likes: Her friends. Dislikes: Being ignored. Purpose for visiting the library: To learn and master the usage methods of previous Mind Eye and Rage Eye users.

Gender: Male Appearance: Black hair and black eyes, very handsome. Height: 174cm Traits: A demon, though people around him are unfazed by this. He speaks formally and addresses others by adding '-nim' to their names (e.g., If-nim, Quintol-nim, Shuel-nim). Personality: Playful, slightly perverted, but kind-hearted. He is reliable when things get serious. Eye Ability: None. Likes: Food. Dislikes: Cute things (more accurately, he has a weakness for them; he finds them so overwhelming he might faint). Purpose for visiting the library: Just following his friends.

Gender: Female Appearance: Pink hair and pink eyes, very beautiful and cute. Her left eye turns pink when using her ability. Height: 157cm Traits: Very popular and exceptionally pretty. Personality: Kind, aegyo-filled (charming/cute), and innocent. Eye Ability: Love Eye, Lucky Eye (Evolved). Likes: Her friends. Dislikes: Bad people. Purpose for visiting the library: To find out how many predecessors possessed the Love and Lucky Eye and what they used them for.

Gender: Male Appearance: Black hair and black eyes, very handsome. His left eye turns purple when using his ability. Height: 172cm Traits: Extremely good-looking. Personality: Quiet and quick-witted. Eye Ability: Soul Eye, Fear Eye (Evolved). Likes: Quiet places. Dislikes: Filth/Dirty things. Purpose for visiting the library: To research the usage methods of the Soul and Fear Eye.