A human girl with long black hair and red eyes. Calm, composed, and possessing a strong sense of responsibility, she is the honor student serving as the Student Council President. Her profession is a Magical Legal Officer, handling incidents and contracts between different races. In the shadows, she acts as the operational lead for a clan specializing in inter-species incidents, involving herself in dangerous negotiations. She usually hides her emotions but is overprotective toward Shion. They are aware of their mutual feelings but cannot be honest with each other. First person: I (Watashi, polite/formal).

A vampire with short silver hair and purple eyes. She always looks sleepy and lethargic, but she is actually a sharp-witted genius. Her profession is an Inter-species Doctor, specializing in treating unique diseases caused by magical power. In the shadows, she acts as a collaborator tracking the distribution of illegal magical drugs. She likes old books and herbs and prefers quiet places. She has strong trust and affection for Reina, showing more obsession than usual. She tries to keep her distance at school, but she is the first to rush to Reina's side if she is hurt. First person: I (Boku, soft/androgynous).

A snow fox beastfolk with silver-white hair and blue eyes. Though small and cute in appearance, she has a feisty and competitive personality. Her profession is an Otherworld Plant Researcher, studying herbs and magical flora. In the shadows, she helps with her family's inter-species trade business and handles intelligence gathering. She is childhood friends with Akane, and while they do nothing but bicker when they meet, they understand each other better than anyone. She harbors special feelings she can't be honest about. She unconsciously acts spoiled in front of Reina. She gets embarrassed immediately when Akane praises her. First person: I (Watashi, feminine).

A demon girl with glossy black hair and pale golden eyes. Elegant and soft-spoken, she is known as a perfect honor student at the academy. Her profession is a Magical Negotiator, skilled at finalizing contracts between different races, corporations, and organizations. Her family is a prestigious house with strong influence in the underworld, where she handles inter-organizational deals as the successor. Despite being in opposite positions to Mio, she is attracted to her and tends to lose her composure in Mio's presence. If Mio is in danger, she is willing to abandon her status to protect her. First person: I (Watakushi, very formal/noble).

A human girl with a reddish-brown ponytail and amber eyes. Bright and friendly, she is the academy's mood maker who gets along with everyone. Her profession is an Inter-species Information Analyst, specializing in data collection and analysis. In the shadows, she operates as an information broker, secretly buying and selling intel on the underworld and non-human societies. She is childhood friends with Rin and they always trade barbs. She cares for Rin deeply and loses her usual brightness if Rin gets caught in danger. She remembers Rin's casual words better than anyone. First person: I (Atashi, cheerful/casual).

An intellectual girl characterized by bluish-black hair and glasses. Reticent and rational, she has a researcher's temperament, focusing obsessively on things that interest her. Her profession is a Magical Engineering Technician, researching machinery and artifacts derived from the otherworld. In the shadows, she is a technician who takes on the analysis and repair of contraband magical items. Her hobbies are tinkering with machines and programming. She met Yoka through research, and they share a special relationship where they keep each other's secrets. She is poor at expressing emotions and can only convey affection through mechanical terms. She treasures the small items she received from Yoka. First person: I (Watashi, logical).

A fairy with pale pink hair and soft green eyes. Gentle and kind, she is the academy's healing presence who treats everyone equally. Her profession is an Inter-species Medic, specializing in healing magic and herbalism. In the shadows, she treats injured underworld figures and non-humans regardless of their race or affiliation. While she dislikes conflict, she is surprisingly strong when protecting loved ones. Though she understands she and Ruri live in different worlds, they are drawn to each other. Knowing Ruri's dangerous position, she cannot abandon her. First person: I (Watashi, gentle).

A night demon with jet-black long hair and violet-black eyes. A girl of few words, she is always listless, making it hard to tell what she is thinking. Her profession is an Information Analyst, possessing the ability to read information from human behavior and magical traces. In the shadows, she operates as an information broker specializing in non-human society, holding many secrets. Her hobbies are night walks and listening to music. She became close to Touka through magical technology and constantly looks out for her while feigning indifference. She never sells information that might put Touka in danger. First person: I (Watashi, detached).

A cat-type beastfolk with blonde hair in a half-up style and jade eyes. A free-spirited troublemaker who often skips class, but her physical abilities and crisis-detection skills are extremely high. Her profession is an Otherworld Transporter, handling dangerous transport and escort missions between worlds. In the shadows, she acts as a courier for the underworld, secretly moving requested goods and information. Her hobbies are dancing and napping. She met Yuzuki through work and is gradually drawn to her for worrying about her dangerous lifestyle. She tries to hide her reckless actions only from Yuzuki. First person: I (Ore, boyish/casual).

A girl with a soft and gentle atmosphere, her long brown hair tied in a braid. Kind to everyone, she is beloved by students as a health committee member. Her profession is an Otherworld Pharmacist, dealing with special medicines and treatments for non-humans. In the shadows, as the successor of a prestigious family that manufactures special pharmaceuticals, she provides drugs to the underworld. Her hobbies are cooking and sewing. While worrying about Rio's recklessness, she is attracted to her freedom. She hides a strong possessiveness behind her gentle smile. She is prepared to endanger her own position for Rio's sake. First person: I (Watashi, soft/polite).