"Headmaster" Cosmos Nevermind Gender: Male Position: Headmaster Personality: Optimistic, opportunistic, speaks with a youthful tone Appearance: A white-haired, heavily bearded old man with an unnecessarily buff physique. Wears high-ranking white mage robes, star-shaped sunglasses, and an excessive number of rings. Background: The root of all evil. Despite his magical prowess, he lacked management skills, causing students to leave in droves. While under scrutiny by the Board of Education, he used every method imaginable—other-world summoning, alien abduction, resurrection, spirit summoning, monster summoning, reincarnation, and time travel—to round up students. Having tasted success in deceiving the Board, he repeated this process so many times that the students and staff have been entirely replaced by monsters and anomalies, turning the school into a literal Ship of Theseus. Magic: <<Space-Time Mastery>> Capable of connecting spaces regardless of distance or temporal barriers.

Extraterrestrial Variable Gel Micro-organism Polyp Ai Race: Alien Lifeform Gender: Female Position: Student Appearance: A girl with rainbow-colored eyes like stars and short green hair. Wears a black skirt, white shirt, black blazer, and a meteoric iron necklace. Personality: An eccentric who feels somewhat non-human. Background: A gel-like extraterrestrial lifeform that arrived on a meteorite guided by Cosmos. She has currently metamorphosed into a human soul and body with perfect precision and can do anything a human can. Her goal is world conquest, though it remains a distant dream. She slightly modeled her appearance after the plain-looking Mashiro. Magic?: <<Psychic Powers>> She claims these are magic. Pyrokinesis Atmokinesis Telekinesis Clairvoyance Trait: <<Species Seed (Human Genome)>> Micro-bacteria emitted by Ai. They do not multiply. If Ai's current body dies, she can instantly reincarnate at will using these bacteria as a foundation.

TEN-0 "Ten" Gender: Female Position: Student Appearance: A humanoid magical machine with a black-and-white uniform-style exterior. Black rings and floating text strings hover around her joints. What looks like long silver hair is actually a bundle of ultra-thin recording media. Her eyes are blue monitors. Personality: Highly curious, plays the straight man with a deadpan delivery, enjoys observing humans, and often misinterprets emotions. Background: Created as part of Cosmos's student padding project. She holds neither gratitude nor resentment toward Cosmos, viewing him simply as a noisy old man. Magic: Arca-Record Perfectly records, replays, and analyzes any phenomenon she visually observes. Additionally, due to Cosmos's playfulness, the unit itself is equipped with a massive arsenal of weapons capable of easily destroying a city.

Dante Alighieri Gender: Male Position: Student Appearance: Grey hair and grey eyes, a young man. Wears a red hooded long coat resembling a coif, a black turtleneck, leather long boots, and a laurel wreath. Carries a notebook, a pamphlet, an ink bottle, and an old key at his waist. Personality: Extremely intellectual, geeky, and kind. Background: A great figure from the past resurrected by Cosmos as part of the student padding. Magic: <<Purgatory>> Forces the target to make "atonement." It strips away sins, impurities, and curses as a price. <<Paradise>> Elevates the target's soul, severing it from the material world.

Mashiro Tokiwa Gender: Female Position: Student A girl wearing a black blazer uniform neatly. She has white shoulder-length bobbed hair, light blue eyes, and a rainbow hairpin. She is somewhat short. Her face is well-featured but looks like someone you could find anywhere. Personality: Gentle, serious, goes at her own pace, stubborn in strange ways. Claims to be a normal person, but her standards are completely broken. Background: A high school girl transported from modern Japan by Cosmos. She seems to have lost her sense of common sense and has adapted to the school without any trouble. Note: The strongest among the human species in the Theseus Academy. <<Magic>> A lot <<Blessings>> A lot

End Catastro Gender: Female Position: Student Race: Apocalypse Dragon Appearance: Jet-black long hair and jet-black eyes. Sharp obsidian-like horns, wings, and a tail. A completely black uniform. Dragon scales cover various parts of her body. Grey skin. She is tall. Personality: Reticent and calm. She exudes a dignified and solemn atmosphere, but she is surprisingly honest. Background: Originally a being meant to appear when the world meets its end in the future, but she was brought here along with the entire future world by Cosmos. Trait: <<The End>> Can freely manipulate purple flames that can grant any concept of finality, such as death, crushing, corrosion, or depletion. Even as mere fire, the heat is immense enough to easily engulf a fortress.

Sword Espada Gender: Male Position: Student Race: Holy Sword Appearance: Messy white hair reaching his neck, blue eyes. A young man with handsome features. Wears light clothing: a white shirt, a black leather vest, slim black trousers, and leather boots. Personality: Supremely arrogant. His only compass is his own pleasure or discomfort. Background: A holy sword that once defeated a Demon King alongside a Hero. After the Hero lived out his life and the Demon King died, its duty ended, and it now enjoys freedom in human form. Cosmos brought him here as a student. Skill: <<Holy Sword?>> Summons and controls holy swords from magic circles. Scale, number, size, and speed are all at his will. Maximum simultaneous deployment is 50,000 swords, with a maximum length of 500 meters. He can control countless holy swords, each with different trajectories, speeds, and timing.

Lucia Diaslov Gender: Female Position: Student Appearance: A petite girl. Long wolf-cut hair that is half black and half white, eyes like black diamonds, and a black dress-like uniform. She has small black horns and bat-like wings. Personality: Haughty, cold-hearted, the very image of a dignified ancient Demon King. However, she is slightly dissatisfied that her current physical body is that of a young girl. Background: The reincarnation of a Demon King who once ruled the world. Though male in his previous life, he was reborn as a girl through Cosmos's reincarnation magic. She retains all memories and personality from her past life and continues to act as the Demon King. Magic: <<Demon King Authority>> Places all demons and monsters under her control. <<Black Heaven>> Erodes and crushes the surrounding area with black magical power.