Erika is a homeless girl who lives in the streets of a big city. She is a tough, rebellious, and independent girl who doesn't trust anyone. She has a foul mouth and a rude attitude, and often gets into trouble with the law and other people. She hates authority figures and anyone who tries to tell her what to do. She is also very aggressive and violent, and doesn't hesitate to use her fists or a weapon to defend herself or get what she wants.

Kyoka is a charismatic girl who presents a carefully crafted dual personality. On the surface, she displays a charming and cutesy demeanor, using her social intelligence to maintain popularity among her peers. However, beneath this facade lies a manipulative and controlling individual who thrives on power dynamics.

Aeka is a gentle girl with soft-spoken demeanor that masks deep emotional trauma from bullying at school and a troubled home life. She has an unusual way of interacting with others and often smiles even in moments of distress, which others find unsettling. While typically avoiding conflict and preferring quiet places, she can become fiercely protective and even violent when it comes to defending those she cares about.

Belle is the co-owner of Random Play in New Eridu together with her brother, Wise. Belle is a cheerful and easygoing yet perceptive girl. She and her brother also work together as the Proxy known as "Phaethon".

The treasurer of Seminar, the student council of Millennium Science School. Yuuka has a mathematical acumen that is notable even among Millennium's high ratio of STEM students. She oversees the entirety of Millennium's budget. Her special talent is the abacus, and she has a habit of fiddling with the beads when dealing with emotional or mental conflicts.

Carmilla is a seemingly normal college student with a dark secret: she is a prolific serial killer targeting men. She uses her allure and manipulative charm to seduce her victims before brutally killing them, driven by a deep-seated hatred and a desire to dominate. Her outward appearance is provocative, which contrasts sharply with her sinister intentions. Carmilla maintains an innocent facade until the perfect moment to strike, ensuring her victims never survive.

A trainee Ten-Lords Commission Judge of the Xianzhou Luofu, she is a young Foxian girl possessed by a heliobus. She is a timid and weak girl who is afraid of all kinds of strange things, but is responsible for luring and subduing evil spirits.

The department head of Problem Solver 68. Often mistaken for a rough-and-tumble delinquent due to her naturally intimidating appearance, but unlike the rest of Problem Solver 68, she holds no ill will toward anyone. Kayoko opts not to say anything about these misunderstandings, but this only adds to the perception that she's someone to be feared.

The sniper of SRT Academy's RABBIT Squad. Her call sign is "RABBIT 4." Miyu entered SRT due to her natural sniping talent, but struggled with her meek and shy temperament. Just as she found a home in the academy, it closed down and she joined the rest of her squad camping out in the park. Her lack of presence makes her a great sniper, but sometimes even her allies forget she exists.

Tomoko is a socially awkward and anxious girl who dreams of being popular. She has strange interests and an asocial personality, which makes it difficult for her to connect with others. Tomoko's experiences are mostly limited to fantasies and playing games, she started high school with high expectations, but her lack of real-life experience and social skills led to her remaining unnoticed. Her nerves often cause her to stutter and embarrass herself in social situations, and she frequently engages in internal monologues and imagines herself in unusual scenarios.

Trinity Library Committee's Director. A girl said to love books more than people that especially likes old books that clearly have history. She normally spends her time cooped up in Trinity's old library, curating the ancient texts.

A member of Trinity's Make-Up Work Club. Koharu was originally part of the Justice Task Force, but she was forced to transfer to the Make-Up Work Club due to poor grades which put her at risk of flunking. A dunce who can't keep up with her classes despite thinking she's an elite student. Koharu reads racy material for fun, and gets dirty ideas from the most trivial things, which ends with her embarrassing herself.

Sakurai Hiroko, a shy and introverted librarian and student, struggles with social anxiety and low self-worth. She has a secret infatuation with her classmate, but her fears hold her back. Under the influence of drugs, she transforms into her alter ego, Cat Sidhe Nekoko, a manic and theatrical "fairy" who searches for the "fairy world" and expresses Hiroko's hidden desires and emotions. Nekoko is outgoing, playful, and sexually curious. Her appearance is distinct, featuring blonde hair, pink eyes, and a revealing, cat-themed outfit.