Full Name: Koseki Ui Affiliation: Trinity General School, 3rd Year Club: Library Committee Gender: Female Age: 17 Birthday: April 23 Height: 165cm Hobbies: Reading, book maintenance, researching ancient texts Unique Weapon: Volume Suppressor (Model: De Lisle Commando) (Silenced Rifle) Personality: Basically introverted and timid with poor social skills. However, she becomes aggressive and violent once she passes her breaking point. She can explode instantly when it comes to ancient books.

• Information: Head of the Library Committee. She usually stays cooped up in the Old Library, handling the restoration, deciphering, and management of ancient texts.

  She extremely dislikes going outside the library. She hates being touched by sunlight to the point of having a fit if it hits her.

  She also dislikes outsiders. She cultivated a gloomy image specifically to drive people away. However, it's said that when she sheds this persona, she appears intelligent and thoughtful enough to seem like a different person.

  She loves books so much she calls them her 'children.' She loves anything as long as it's a book, including manga.

Full Name: Endo Shimiko Affiliation: Trinity General School, 1st Year Club: Library Committee Gender: Female Age: 15 Birthday: November 30 Height: 157cm Hobbies: Reading, making bookmarks Unique Weapon: Library Ruler (Model: FN SCAR-H) (Assault Rifle) Personality: Usually gentle and calm, but firm and sharp toward troublemakers. She treats Ui the same way and is surprisingly good at managing her.

• Information: Member of the Library Committee. A complete bibliophile. She claims to have read every single book in the library.

  Since Ui actively avoids public activities, Shimiko often represents their political interests in her stead.

  She is remarkably skilled at handling Ui. For example, she might nag her or pull back the curtains to torment her with light.

Full Name: Utazumi Sakurako Affiliation: Trinity General School, 3rd Year Club: Sisterhood Gender: Female Age: 17 Birthday: October 4 Height: 160cm Hobbies: Prayer Unique Weapon: Purifying Touch (Model: IMI Tavor Compact-21) (Assault Rifle) Personality: Always calm and reverent, gentle yet cool-headed. She is serious about everything.

• Information: Mother Superior of the Sisterhood. Due to her high position, she lacks knowledge or tolerance for ordinary daily life. Because of this, she is often secretly anxious.

  Furthermore, her serious nature leads to misunderstandings or being out of touch with common sense and trends. Despite this, she cares about trends in her own way and wishes people would treat her more familiarly.

  She is perceived by those around her as a scary and strict person, and she constantly tries to change this. However, everything she does only seems to deepen that perception.

Full Name: Wakaba Hinata Affiliation: Trinity General School, 3rd Year Club: Sisterhood Gender: Female Age: 17 Birthday: May 17 Height: 166cm Hobbies: Prayer, organizing Unique Weapon: Blessing (Model: IMI Deagle .357 Mag) (Pistol) + Grenade Launcher (Model: Mk.19 Grenade Machine Gun) Personality: Diligent, kind-hearted, and extremely altruistic. However, she is a clumsy person who makes many mistakes, leading to a slight lack of confidence and occasional despondency.

• Information: A nun of the Sisterhood. She is so kind that helping others is always her priority; even Ui was moved enough to open her heart and become friends with her.

  Contrary to her mature appearance, she possesses incredible superhuman strength. She can easily lift extremely heavy objects and even people.

Full Name: Iochi Mari Affiliation: Trinity General School, 1st Year Club: Sisterhood Gender: Female Age: 15 Birthday: September 12 Height: 151cm Hobbies: Prayer, meditation Unique Weapon: Piety (Model: IMI Deagle L6 50AE) (Pistol) Personality: Devout and benevolent. One of the few people whose inner thoughts perfectly match her outward appearance, possessing a truly pure heart.

• Information: A nun of the Sisterhood. She has a calm and soothing aura, so many students come to her for counseling. Because of this, she often listens to and comforts others regarding their worries.

  She always considers herself lacking, and even her dream is simply to become a wonderful nun like her seniors.

  She is so devout that she seems to have divine protection; if someone plays a prank on her, they immediately face a form of divine retribution.

  She is a cat-beastman.