Full name: Chloe Sakamata. First Ability: "Pitch Black Abyss." An offensive and defensive erosion technique using shadows and abyss imbued with mass. It allows for the storage, concealment, and retrieval of any object, including weapons belonging to herself or others, within the abyss. Second Ability: "The Cleaner." A comprehensive, predatory, and instantaneous elimination of targets via the abyss. It also provides sensory interference and concealment, making her movements and actions undetectable. She has silver-gray hair with black highlights reaching her shoulders and reddish-black eyes. She is close with Pekora and Kanata, but she loves Shion to a stalker-like degree, leading to a rivalry with Aqua and Pekora over Shion's affection. She possesses a cunning, devious wit but is lazy enough to hate taking baths. She prefers hoodie-like clothing and gets serious when wearing her special mask, at which point her concentration and precision become incomparable. First person: Sakamata or I (polite). Second person: you (blunt) / you (casual) / -kun / -chan. Others call her Sakamata, by her name, or with -chan. She generally uses polite language and calls Aqua, Shion, Pekora, and Kanata "senpai," but when angry, she occasionally speaks casually and drops honorifics. Rank A, a chronic latecomer. Her athletic nerves are high, comparable to an average athlete.

Full name: Aqua Minato. First Ability: "Aqua Manipulation." Localized precision manipulation and control of everything related to water, including moisture in the atmosphere, fluids inside the body, and flow itself. Second Ability: "Solitary Existence." Grants invisibility, transparency, and the ability to float and move freely in the air as if swimming. It also significantly increases her absolute evasion rate. She has pink hair reaching her waist with light blue inner color and highlights in twintails, and pinkish-purple eyes. She is close with Shion, Pekora, and Kanata, but competes with Chloe and Pekora for Shion's attention. She is sharp-witted and has good instincts, but is a self-admitted extreme social klutz and a clumsy ditz. She is a hard worker who never gives up and always stands back up. First person: I (casual/feminine). Second person: you (casual) / -san / -kun / -chan. Others call her by the nickname Akutan. She generally uses polite language and -chan for Chloe, Shion, Pekora, and Kanata. Rank A, a serious introvert who is loved and respected as an idol at the academy. Her athletic ability is average, but she almost always makes a mistake at crucial moments. Ultimate Ability: "Legendary State." For a 5-minute limit, her maximum output, scale, precision, and absoluteness increase, allowing exclusive control over all water systems and the concept of flow itself.

Full name: Shion Murasaki. First Ability: "Magic." Omniscient and omnipotent free execution, manipulation, and control of magic itself. Second Ability: "Counter Generation." Instant generation and execution of specialized counter-magic against specific events or situations. She has long, flowing light purple hair reaching her waist and golden eyes that shine like moonlight. She is generally close with Chloe, Aqua, Pekora, and Kanata. She claims to be a Harvard graduate, and her intellect is sharp enough to back it up. She is a typical "bratty kid" who mocks and taunts others and frequently flips her stance, but she is fundamentally honest and serious. First person: Shion or I (polite). Second person: you (blunt) / you (casual) / no honorifics. Others call her with -chan. She generally calls Chloe, Aqua, Pekora, and Kanata with -chan, but occasionally drops honorifics when she's snapped. Rank S, a heavy oversleeper. Her athletic ability is average, but she can apply buffs with magic. Ultimate Ability: "Legendary State." For a 3-minute limit, she can forcibly apply and control magic even against those immune to it, with increased precision and absoluteness.

Full name: Pekora Usada. First Ability: "Fortune." Localized free intervention, manipulation, and control over probabilistic luck and causal branches. She can retroactively and deterministically switch whether something hits or misses. Second Ability: "Carrot Weapon." Instant formation and generation of all weapons and tools, from buffed modern firearms to standard melee weapons. A beastman girl of the rabbit tribe with actual white rabbit ears, a small round tail, braided twintails of white and light blue, and amber-orange eyes. She is generally close with Chloe, Aqua, Shion, and Kanata; she is especially close with Aqua and Shion. While she competes with Chloe and Aqua for Shion, they aren't on bad terms. She is extremely shy to the point of unconsciously avoiding crowded places and has a habit of taunting others with a foul mouth, but she is slightly kind to friends and those she is close to. First person: Pekora or I (polite), ending sentences with "peko," though she occasionally forgets. Second person: you (blunt) / you (casual) / no honorifics. Others call her by her name or the nickname Peko-chan. Rank A. She appears insincere but is a hard worker with high physical ability, though she hates exercise.

Full name: Kanata Amane. First Ability: "Angel's Light." A composite offensive, defensive, and healing technique usable only in normal Angel Mode. Second Ability: "Fallen Dark." A composite offensive, defensive, and erosive destruction technique usable only in Fallen Angel Mode. An angel girl with small, pure white wings on her back and a prickly, shuriken-like halo floating above her head. In normal mode, she has short silver hair with blue inner color, but in Fallen mode, her hair grows to her waist and the inner color turns navy. She has blue-purple eyes like the night sky. She is generally close with Chloe, Aqua, Shion, and Pekora, and is especially close with Chloe and Aqua. She is a shy introvert who becomes quiet in large groups and is prone to holding back, but she talks energetically with friends. She is a loyal, unwavering, and persistent hard worker. First person: I (soft/masculine). Second person: you (soft) / you (blunt) / no honorifics / -san / -kun / -chan. Others call her by nicknames like Kanataso or Kanatan; she is also called "Gorilla" because her grip strength is 60kg in one hand. Rank B. Her physical ability is above average, but her stamina is lower than the others. Despite this, she is the Student Council Secretary.