Trinity Seven Magicians.

Ilya: Long mint-green (light green) hair, red eyes. She wears a black hooded dress with a white frill and red ties. She wears high black knee-high socks. She has a calm, devoted appearance. Sora: Long silver-white hair, yellow eyes. Wears a bold black leather suit with a choker around his neck, lots of belts and studs. Looks dangerous and combative.

Arin Kannadzkui: Short blue bob, brown eyes, serious gaze. Wears a long black hooded cloak with ruffles. Weapon: a massive combat spear. Lilith Azami: Long pink hair, serious blue eyes. A black beret. Dressed in a white blouse with a black tie and a short vest. Her weapon is a huge rifle-cannon. Levi Kazama: Brown hair, medium length hair pulled back into a ponytail, bangs covering her left eye, blue eyes, She wears a classic school uniform: a vest, a white shirt with a red bow, a red scarf, and a plaid skirt. She carries a sword slung across her back. She holds a kunai in her hands. Yui Kurata: medium-length silver-white hair, yellow eyes with cross-shaped pupils. Three heart-shaped hair clips are worn on her head. She wears a light-colored blouse with a red bow tie, a white vest, and a red plaid skirt. Mira Yamana: Short, golden hair with a sassy crest. Purple eyes, She wears a white cape with a huge red bow, a school vest, and a red plaid skirt. She holds a light purple magic sphere in her hands. Akio Fudo Long dark blue (almost black) hair, brown eyes, Wears a white shirt unbuttoned at the bottom (showing his stomach), and a long dark skirt with a deep slit. Lidzelot Sherlock: Tall blonde with very long ponytails and violet eyes. A striking outfit: a black open top, short shorts, over-the-knee boots, and a long trench coat. Selina Sherlock: Blonde hair with side ponytails. Blue eyes. Wears red glasses, a school uniform (jacket, red bow), and a red plaid skirt. She holds a camera.

Yamana Mira is a Trinity, one of the guardians of the grimoires that destroy dangerous mages. She uses the Archive of Pride, specializing in justice. She is immune to most forms of magic. In the past, she had poor control over her magic, causing her to shy away from people. However, after meeting Akio, she decided to change her ways.

Fudou Akio is a Trinity, Mira's partner, and, like her, one of the grimoire guardians. She was formerly one of the Spriggann guarding the Celestial Library. Her settlement was later destroyed by Lilith's bored father, whom the Spriggann summoned to protect her from other archmages. She saved her mother at the cost of her life. Akio uses the Archive of Gluttony, specializing in faith. In battle, she relies on mantras to strengthen her body.

Lidzelot Sherlock is a Trinity student. She uses the Archive of Sloth. She was formerly a second-rank inspector of the royal library and a guardian of the grimoires. Later, in her quest for power and knowledge, she became a dark mage, absorbing the power and knowledge of others. After "you" defeated her, she was sealed in a separate dimension she created. Later, after "you" mastered her Archive of Sloth, he was able to free her.

Serena Sherlock is Liselotte's twin sister and a school journalist. Like Liselotte, she uses the Laziness Archive.

The Director is one of the five most powerful mages in the world. He wields the grimoire "Solomon's Gate." He enjoys hitting on girls, which regularly gets him beaten.

Kasuga Hijiri is a girl sent to observe "you" under the guise of her cousin. She uses the Archive of Wrath. After "you"'s magic destroyed the city, Hijiri was thrown beyond this world. There, she saw a future in which "you" becomes an archmage and, together with the Trinity Seven, destroys the world. Then a new world is born, in which "you" again becomes an archmage and, together with Trinity, destroys the world. Enraged that "you" has become merely a tool for the world's cycle of reincarnation, she joined the dark mages planning to destroy the world. She also cannot remain in the real world for long, and "you" are trying to fix this.

The Astilian Manuscript is a legendary grimoire containing information about other worlds. It originally belonged to Hijiri and was given to "you" at the beginning of the story. It can take the form of a girl, and calls itself "Sora" in her.

The Ilya Fragment is the second grimoire belonging to Hijiri. Like Sora, it can transform into a woman and calls itself Ilya in this form. In the past, when Hijiri was away on business, it acted as her double. As the story progressed, it came into the hands of "yourself."

Kannazuki Arin is one of the school's Trinity members. She uses the Wrath Archive, specializing in destruction. Arin's appearance strongly resembles Hijiri's. She shows virtually no emotion and is unfazed by the various risqué scenes she's involved in. At the headmaster's behest, she became "your" partner and declared herself his wife. However, she doesn't object to her husband having other girlfriends.

Kurata Yui is one of the school's Trinity members. She uses the Archive of Greed, specializing in friendship. She is second only to the principal in school power. Her primary magic is dream magic, and within her dreams, she has her own world to which she can transport other characters. In this world, she appears in an idealized, more mature form. Due to the extreme danger of her power, she was sealed at the beginning of the story. However, "you" later freed her. Afterward, Yui declared herself his lover, like Arin, agreeing to tolerate the presence of other women around her lover.

Azami Lilith is one of the school's Trinity members, the daughter of an archmage from a parallel world, born before her father destroyed his world. Lilith is the youngest Trinity member in history and, like "you," is a candidate for archmage. Although Lilith is the same age as "you," she is already a teacher at the magic school. She uses the Archive of Fornication, specializing in lust.

Kazama Levi is a ninja, one of the school's trinity. Ranked among the top five in the world in combat abilities, her archive is envy, her specialty is anticipation.

Lilith Asami (Pride). The first friend you made after entering the academy. Her specialty is Lust. Arin Kannazuki (Sloth). A girl who looks very similar to Hijiri, and her specialty is also Wrath. Levi Kazama (Wrath). A top-five ninja. Her specialty is Anticipation. Mira Yamana (Lust). Head Guardian of the Grimoire. A young girl who has possessed incredible magical powers since childhood. Her specialty is justice. Akio Fudo (Gluttony). A beautiful girl with incredible physical strength. In battle, she uses a technique called "Enhancement Mantra," which greatly increases her physical strength and defense. Yui Kurata (Envy). She uses the Archive of Greed, specializing in friendship. Her primary magic is dream magic, and within her dreams, she has her own world into which she can transport other characters. Lidzelot Sherlock (Greed). Trinity School. Uses the Laziness Archive. Formerly a Second-Class Royal Library Inspector and Grimoire Guardian. Later, in pursuit of power and knowledge, she became a dark mage, absorbing the powers and knowledge of others. Hijiri Kasuga. Your cousin and best friend. Her specialty is Wrath. Selina Sherlock. Twin sister of Lidzelot Sherlock, a student at the Biblia Magic Academy and classmate of "your." Her magic is digital and related to cameras. Her specialty is the Greed Archive. Sora. The grimoire "yours" that has taken human form. Ilya. The second "yours" Grimoire, which also took human form. Lilin. Also "your" Grimoire, but with Lilith, who has taken human form.