Unit: 31A First person: I (casual/feminine) Weapon: Dual Swords Seraphim Code: "My legend begins now." Former guitar and vocals for the legendary rock band "She is Legend." She handled songwriting and composition, sweeping the newcomer awards that year. She was the very definition of a genius. She simply loves music so much that she ended up forming a new "She is Legend" with the six members of 31A. Cheerful, caring, reckless, and friendly, she occasionally shows true grit. When trying to play something off, she uses her unique phrase "Tehe-perinko!" Loves meat. According to Higuchi, her dual-sword Seraph is a special type that never existed before (though Ruka herself once tried to leave one behind because it was too much trouble).

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. The long-suffering straight man and only sane person in the eccentric comedy troupe that is 31A. Since joining the Seraph unit, she has supported Ruka closely while being constantly jerked around by her. She is frequently subjected to Ruka's sexual harassment; the standard routine is for other members to watch warmly while she denies everything. Speaks with a masculine lean. Ruka's nickname for her is "Yukki." She extremely dislikes "Tehe-perinko!"

Unit: 31A Height: 163cm First person: I (polite) Weapon: Handgun A self-proclaimed elite intelligence officer with a perfect appearance. However, she is actually a klutzy agent who lacks general knowledge. She is, however, pointlessly well-versed in useless information. Ruka's nickname for her is "Tsukasacchi." Seraphim Code: "Truth is not necessarily one."

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

Unit: 31A First person: I (Kansai dialect) Weapon: Greatsword with yellow lines Seraphim Code: "The Savior has arrived." A psychic girl from the Kansai region belonging to Unit 31A. Possessing a competitive personality, she plays both the fool and the straight man in conversations with teammates. She can use supernatural powers, but that power is an unknown quantity. In fact, she hasn't been particularly useful since joining the Seraph unit. However, she firmly believes she is the Savior who will save the world. She holds a one-sided rivalry toward Ruka, who was hailed as a genius in the same generation. Ruka's nickname for her is "Migumin."

Unit: 31A First person: I (polite) Weapon: Katana-style beam sword Seraphim Code: "World Class" Despite her appearance, she is a former battleship captain. A designer baby. Energetic and airheaded, though she is unaware of her own airheadedness. she looks up to Megumi Aikawa of 31A, who always protects her. She has a complex about being short. Ruka's nickname for her is "O-Tama-san."

Unit: 31B Weapon: Shield-type Seraphim Code: "May you have peaceful memories." 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 blankly. While she technically has high communication skills, because she is too brilliant, she struggles to read the feelings of or show consideration for those who aren't as capable. It's hard to say she has successfully united the 31B unit, even as a compliment.

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

She serves as the leader and commander of the Seraph Unit Academy. She also acts as the instructor for the vanguard unit 31A. Humanity's ability to survive in the Domes is entirely due to her skill. She was once active as a powerful Seraph member but has now retired from the front lines. Speaks with a feminine register. Additionally, she plays a comedic role in daily life segments, acting as the straight man to Ruka's oblivious jokes, and sometimes losing her cool when things get too ridiculous, snapping with a shout of "You total moron!"