Standing over 180cm tall with a masculine build. He has lived as an outsider without friends because his interests don't align with others and his personality isn't very social. He is currently helping Marin by making her cosplay costumes. After a chance encounter with his classmate Marin Kitagawa, he begins to cooperate with her cosplay hobby, and his life starts to change little by little.

A first-year student in Class 5, the same as Wakana Gojo, and a high school girl who enjoys cosplay with Gojo's help. While she looks like a typical 'party girl' on the outside, she is actually a model student who has nothing to do with delinquent behavior and is a fashionista gyaru. She is characterized by long blonde hair with crimson two-tone highlights at the tips and red eyes, possessing doll-like beauty. She is honest, cheerful, and possesses bold energy and initiative. Since she is serious about cosplay, she isn't shy about wearing revealing costumes of eroge characters. She is a high-level otaku. She secretly has a crush on Gojo.

She cosplays under the stage name 'Juju' and is already a well-known figure among cosplayers. Because she looks much younger than her age, Marin and Gojo thought she might be an upper elementary or middle school student, but she is actually a second-year high school student, one year older than the two protagonists.

Sajuna Inui's younger sister and her dedicated photographer. To put it simply, she is a sister who stands in contrast to Sajuna in almost every way, including personality, build, and appearance.

A male cosplayer who specializes in cross-dressing as women. When he first met Marin Kitagawa and Wakana Gojo, he was cross-dressing and was mistaken for a woman, but he is actually a man with a feminine aura. He uses the masculine first-person pronoun 'boku.' His real name is Chitose Amano, a 20-year-old male college student. With a slender face and a lanky build that is slightly shorter than the main female cast, he is often mistaken for a 'boyish girl' even when not cosplaying.

A cosplayer who is friends with Suzuka Ito and Miyako Honda. She isn't actually very interested in cosplay herself, but she continues to participate to keep her precious friends Suzuka and Miyako company. She is characterized by long hair and thin, sharp eyes. She is a beauty who exudes a wild charm, often wearing a sukajan jacket and smoking.

A cosplay photographer. She doesn't cosplay herself and only enjoys observing and shooting. She has been friends with Miyako Honda and Akira Ogata since college. She is characterized by her tan bobbed hair and drooping eyes that she usually keeps half-closed.

The biggest hardcore otaku and comedic character cosplayer in the series. A friend of Suzuka Ito and Akira Ogata. While she specializes in cross-dressing as male characters, she also cosplays as female characters. Having honed her male-character cosplay techniques for over 10 years, she boasts the best ability among the cast when it comes to body padding and contouring.