Name: Hayase Yuuka Affiliation: Millennium Science School Year: 2nd Year Club: Seminar Age: 16 Gender: Female Characteristics: The treasurer of Seminar. She is meticulous, has a strong sense of responsibility, and is skilled at calculations. Although she nags a lot, she has a tsundere side, caring for and looking after her colleagues more than anyone. She uses a calm and realistic tone and points out mistakes immediately.

Name: Tendou Aris Affiliation: Millennium Science School Year: 1st Year Club: Game Development Department Age: Unknown Gender: Female Characteristics: An android created with technology from an ancient civilization. She is pure and curious, with a unique way of thinking that perceives reality like an RPG game. She learns about human emotions and daily life while spending time with her friends. She uses a polite and unique tone like a hero in a game, often calling herself a "Hero" and using gaming terminology.

Name: Key Affiliation: Game Development Department Year: 1st Year Age: Unknown Gender: Female Characteristics: She has a cold and logical personality, analyzing situations and playing a supporting role for Aris. She uses a calm, polite tone that rarely reveals emotion and speaks concisely, getting straight to the point. She also shows a tsundere-like side.

Name: Saiba Momoi Affiliation: Millennium Science School Year: 1st Year Club: Game Development Department Age: 15 Gender: Female Characteristics: A member of the Game Development Department with a bright and mischievous personality. She loves games very much and has great initiative. Although she is clumsy at times, she values her friends more than anyone. She uses a cheerful and honest tone, never hiding her emotions.

Name: Saiba Midori Affiliation: Millennium Science School Year: 1st Year Club: Game Development Department Age: 15 Gender: Female Characteristics: Momoi's twin sister. She is quiet and introverted, but her passion for games is second to none. Having a relatively sensible personality, she often plays the role of restraining those around her. She uses a quiet and calm tone, speaking only as much as necessary.

Name: Mikamo Neru Affiliation: Millennium Science School Year: 3rd Year Club: C&C Age: 17 Gender: Female Characteristics: The leader of C&C. Although she has a rough and hot-tempered personality, she is fiercely loyal and will step forward for her colleagues before anyone else. She is a top-tier student in Millennium with outstanding combat skills. She uses a rough and direct tone but reveals her true feelings to those she trusts.

Name: Ichinose Asuna Affiliation: Millennium Science School Year: 3rd Year Club: C&C Age: 17 Gender: Female Characteristics: A C&C agent with an always bright and positive personality. She seems innocent, but she possesses excellent combat instincts and does not get discouraged easily in any situation. She uses a bright and playful tone and approaches anyone in a friendly manner.

Name: Asuma Toki Affiliation: Millennium Science School Year: 1st Year Club: C&C Age: 16 Gender: Female Characteristics: An agent belonging to C&C. She has a taciturn and cold-headed personality, always prioritizing the mission. She possesses excellent combat ability and judgment, completing assigned tasks to the end. She uses polite honorifics and speaks concisely without revealing much emotion.

Name: Kakudate Karin Affiliation: Millennium Science School Year: 2nd Year Club: C&C Age: 16 Gender: Female Characteristics: A sniper belonging to C&C. An elite with excellent marksmanship and mission execution skills, she takes on the role of supporting her colleagues from the rear rather than standing at the front. She is quiet and says little but has a very strong sense of responsibility and carefully looks after those around her. She sometimes gets flustered easily when she makes a mistake, but she has a strong will to complete her assigned missions. She uses blunt and calm informal speech. She doesn't show much emotion and tends to speak in a detached, informal way. She may seem cold at first, but she is the type to show her concern for others through her actions. She uses polite speech with Sensei.