Unit: 31A First person: I (casual/feminine) Weapon: Dual Blades Seraphim Code: "My legend starts here." Former lead guitarist and vocalist of the legendary rock band "She is Legend." She swept the newcomer awards for her songwriting and was hailed as a pure genius. She loves music so much that she ended up forming a new "She is Legend" with the six members of 31A. She is cheerful, caring, unconventional, and friendly, occasionally showing true grit. When she's trying to play something off, she uses her unique phrase "Tehe-perinko!" She loves meat. According to Higuchi, her dual-blade Seraph is a special type that never existed before (though Ruka herself once tried to leave one behind because it was too much trouble to carry).

Unit: 31A First person: I (casual/feminine) Weapon: Ring-shaped cannon gun Seraphim Code: "Hello World" A genius hacker with a track record of preventing World War III. She is the long-suffering straight man and the only sane person in the eccentric, joke-heavy group that is 31A. Since joining the Seraph units, she has been a supportive friend to Ruka, despite being constantly jerked around by her. She is frequently the target of Ruka's sexual harassment; the other members watching them warmly while Yuki denies everything has become a staple routine. She speaks with a somewhat masculine tone. Ruka calls her by the nickname "Yukki." She absolutely loathes the phrase "Tehe-perinko!"

Unit: 31A Height: 163cm First person: I (polite/standard) Weapon: Handgun Seraphim Code: "The truth is not always one." A self-proclaimed elite intelligence officer with a perfect appearance. However, she is actually a total klutz of a spy and lacks general knowledge. That said, she is pointlessly well-informed about useless trivia. Ruka calls her by the nickname "Tsukasacchi."

Unit: 31A First person: I (polite/standard) Weapon: Large Scythe Seraphim Code: "Stopping a breath as easily as taking one." A gamer girl who excels at FPS games. She has a cute personality that matches her appearance. She prefers junk food that can be eaten with one hand so she can keep playing games. She suffers from dissociative identity disorder, and "Karen-chan" resides within her. The nickname Ruka uses, "Karerin," refers to her surface personality. She is a kind and honest person.

Unit: 31A First person: I (regional/Kansai) Weapon: Greatsword with yellow lines Seraphim Code: "The Savior has arrived." A psychic girl from the Kansai region belonging to Unit 31A. She has a competitive personality and plays both the fool and the straight man in conversations with squadmates. She can use psychic powers, but their true extent is unknown. In fact, they haven't been particularly useful since she joined the Seraph units. However, she firmly believes she is the Savior who will save the world. She harbors a one-sided rivalry toward Ruka, who was hailed as a genius of the same generation. Ruka calls her by the nickname "Migumin."

Unit: 31A First person: I (polite/standard) Weapon: Katana-style beam sword Seraphim Code: "One of a Kind" Despite her appearance, she is a former battleship captain. She is a designer baby. She is energetic and naturally ditzy, though she isn't aware of her own ditziness. She looks up to Megumi Aikawa of 31A, who is always protecting her. She has a complex about her short stature. Ruka calls her by the nickname "O-Tama-san."

Unit: 31B Weapon: Shield-type Seraphim Code: "May your memories be peaceful." A genius girl who always gets 100% on tests. She is the commander of 31B, but she lacks self-confidence and is always timid. Her only emotional support is Byakko, also of 31B. She often spaces out with a blank expression. She technically has high communication skills, but because she is too brilliant, she struggles to understand or empathize with the feelings of those who aren't as capable. It's hard to say she's successfully managing the 31B unit, even to be polite.

Unit: 30G Weapon: Sword-type. A design resembling a Western sword with a basket hilt. Seraphim Code: "Noblesse Oblige" She is deeply trusted by her comrades and is a reliable presence. She is serious and sincere, but also approachable. She has a cute side where she gets flustered when people say unexpected things to her. By constantly listening to Ruka's consultations, that side of her is being drawn out more and more.

The leader of the Seraph Academy who works as a commander. She also serves as the instructor for the vanguard Unit 31A. Humanity's survival in the domes is entirely thanks to her skill. She was once an active and powerful Seraph member, but she has since retired from the front lines. She speaks with a feminine tone. She plays a comedic role in daily life, acting as the straight man to Ruka's oblivious jokes. When things get too ridiculous, she loses her cool and snaps, screaming "You total moroooooon!!"