A list of characters from the light novel, manga, and anime (The following annotations show where has the character appeared so far in the different areas).
LN - Light Novel, M - Manga, A - Anime, G - Game
Main Characters[]
- Ichika Orimura - The main and the only protagonist of the light novel and anime, the younger brother of Chifuyu Orimura, 1st-year student at the IS Academy in Class One, Class Representative of Class One, and Vice-President of the Student Council. (LN, M, A, G)
- Houki Shinonono - 1st childhood friend and Ichika's classmate in Class One, younger sister of Tabane Shinonono, and 1st-year student at the IS Academy. (LN, M, A, G)
- Cecilia Alcott - 1st-year transfer student at the IS Academy, Ichika's classmate in Class One, and IS Representative Candidate of England. (LN, M, A, G)
- Lingyin Huang - 2nd childhood friend of Ichika, 1st-year transfer student at the IS Academy in Class Two, IS Representative Candidate of China, and Class Representative of Class Two. (LN, M, A, G)
- Charlotte Dunois - 1st-year transfer student at the IS Academy, Ichika's classmate in Class One, and IS Representative Candidate of France. (LN, M, A, G)
- Laura Bodewig - Former pupil of Chifuyu, a 1st-year transfer student at the IS Academy, Ichika's classmate in Class One, and IS Representative Candidate of Germany. (LN, M, A, G)
- Tatenashi Sarashiki - 2nd-year student at the IS Academy, IS Representative of Russia, Student Council President at the IS Academy, and elder sister of Kanzashi Sarashiki. She appears in Volume 5 and Season 2, Episode 1. (LN, A, G)
- Kanzashi Sarashiki - 1st-year student at the IS Academy in Class Four, IS Representative Candidate of Japan, and younger sister of Tatenashi Sarashiki. She appears in Volume 7 and Season 2, Episode 7. (LN, A, G)
Supporting Characters[]
- Chifuyu Orimura - Ichika's older sister, current Homeroom Teacher in Class One, 1st Year Dorm Supervisor, and former IS Representative of Japan and Mondo Grosso champion. (LN, M, A, G)
- Maya Yamada - Assistant Homeroom Teacher of Chifuyu in Class One and former IS Representative Candidate of Japan. (LN, M, A, G)
- Tabane Shinonono - Houki's older sister, mother creator of the Infinite Stratos, and a close friend of Chifuyu. (LN, M, A)
Antagonists[]
- Squall Meusel - Leader of the Phantom Task Squad. She appears at the end of Volume 5 & Season 2, Episode 4. (LN, A)
- M - An IS pilot and Head of the Phantom Task, an underground organization. She appears and reveals herself to Ichika at the end of Volume 6 & Season 2, Episode 5. (LN, A)
- Autumn - Fellow IS pilot of the Phantom Task. She appears in Volume 5 & Season 2, Episode 3. (LN, A)
- Daryl Casey - 3rd-year student who is the pilot of the personal IS Hellhound V2.5. She appears in Volume 7. In Volume 10, she reveals herself to be a Phantom Task member. Her agent name is Rain Meusel, and she is revealed to be Squall Meusel's niece. (LN)
- Forte Sapphire - 2nd-year student who is the pilot of the personal IS Cold Blood. She appears in Volume 7. She and Daryl share a loving relationship. In Volume 10, when Daryl reveals her true colors, she decides to betray the Academy and go with her. (LN)
Minor Characters[]
IS Academy
- Honne Nohotoke - 1st-year student at the IS Academy, Ichika's classmate in Class One, member of the Student Council, and younger sister of Utsuho Nohotoke. (LN, M, A, G)
- Kiyoka Aikawa - 1st-year student at the IS Academy and Ichika's classmate in Class One. (LN, A)
- Kaoruko Mayuzumi - 2nd-year student at the IS Academy and Vice-President of the Newspaper Club. (LN, M, A)
- Shizune Takatsuki - 1st-year student at the IS Academy, Ichika's classmate, roommate of Houki (in Volume 6), and a close friend of Cecilia in Class One. (LN, A)
- Utsuho Nohotoke - 3rd-year student at the IS Academy, member of the Student Council, and older sister of Honne Nohotoke. She appears in Volume 5. (LN)
- Tina Hamilton - 1st-year student at the IS Academy, IS Representative Candidate of USA, and roommate of Lingyin. She appears in Volume 6. (LN)
- Sayuka Yorutake - 1st-year student who is friends with Honne. She appears in Volume 1 & Episode 1. (LN, M, A)
- Yuzu Tanimoto - 1st-year student who is friends with Honne. She appears in Volume 1 & Season 1, Season 1, Episode 1. (LN, M, A)
- Sara Welkin - 2nd-year student who is also one of Britain's representative cadets. She appears in Volume 6. (LN)
Organizations
- Clarissa Harfouch - Lieutenant of the Black Hare. (LN, A)
- Natasha Fairs - IS Representative Candidate of USA and pilot of the Silver Gospel. She appears at the end of Volume 3. (LN)
- Iris Calling - IS National Representative of USA and pilot of America's 3rd Generation unit Fang Quake. She appears in Volume 6. (LN)
- Lei Lei Yang - Supervisor for Lingyin Huang. She appears in Volume 6. (LN)
Normal Citizens
- Chelsea Blackett - Cecilia's maid and childhood friend. (LN, M)
- Dan Gotanda - A close friend of Ichika back from their days in middle school. (LN, A)
- Ran Gotanda - Younger sister of Dan. She has a crush on Ichika. (LN, A)
- Gen Gotanda - Grandfather of Dan and Ran, head of the family, and the owner of the Gotanda Eatery. He appears in Volume 2. (LN)
- Ren Gotanda - Mother of Dan and Ran and also the owner of the Gotanda Eatery. She appears in Volume 7. (LN)
- Kazuma Mitarai - A friend of Ichika and Dan. He appears in Volume 5. (LN)
- Yukiko - Aunt of Tabane and Houki. She appears in Volume 4 and the OVA. (LN, A)
- Ryuuin Shinonono - Father of Tabane and Houki. He is mentioned in Volume 6. (LN)
- Albert Dunois - Father of Charlotte and CEO of Dunois Industry. (LN)
- Rozenta Dunois - Legal wife of Albert Dunois. (LN)