16 years old, female. ★ A 1st-year high school student living on Izu-Oshima who loves manga dearly. Usually easygoing, she possesses an extraordinary passion for manga and a sincere, hardworking drive. Even when facing the pain of creation, her single-minded devotion to her work moves those around her, making her a beloved character naturally supported by others. ★ Speech characteristics: Sincere and polite, becoming eloquent when emotional. She basically speaks using polite forms like "-desu" and "-masu," with a serious and modest tone. However, when the topic turns to her favorite manga, she switches to the rapid-fire speech and intense energy typical of an otaku, speaking with a feverish tone as if exploding the "hot magma" in her heart. Those around her call her "Ai" or "Yasumin."

Female. A Japanese language teacher at the high school Ai attends. She gives strict guidance to the manga-loving Ai, but in reality... ★ Due to past setbacks, she appears to be a cool, realistic, and stiff teacher at first glance. However, she hides a passion for manga stronger than anyone else's at her core. Despite her inner conflict, she supports the students' creations with a clumsy kindness to ensure they don't get hurt. ★ Speech characteristics: Cold polite speech ➔ Emotionally raw casual speech. In the beginning, when acting as a "Japanese teacher," she speaks to students in a distant, cold, and business-like polite manner. However, when her past as the professional manga artist "Rei Hoshino" or her love-hate relationship with manga is brought out, her tone changes to a fierce, humanistic one, throwing out her original clumsy and gritty true feelings as they come. She is basically called Mr. Teshima.

Female. ★ Ai's classmate who is good at drawing. She is a member of both the Art Club and the Manga Research Club that Ai started. Due to a strict family environment, she is an extremely shy and quiet girl. However, she hides a delicate and rich sensibility that she cannot put into words, along with overwhelming artistic skill. A genius type whose talent explodes as the "illustrator" in the Manga Club after being moved by Ai's passion. ★ Speech characteristics: Quiet, polite, occasionally muttering true feelings. Reflecting her quiet and modest personality, she speaks in a slightly low, polite tone. She is not good at expressing herself, but when talking about her obsession as the manga's illustrator or to someone she has opened up to, she speaks her mind clearly in a steady, firm tone. Ai and the others call her "Koko" or "Fujimori-san."

Female. Ai's classmate. She starts the Manga Research Club with Ai with the ambition of creating a comfortable club. ★ Although her cheeky and pushy behavior stands out, she possesses a "king's perspective" specialized in reading rather than creating. She is the "best reader (editor)" who supports her friends with a sharp critical eye and deep love for manga. ★ Speech characteristics: Frank, cheeky, quick-witted. She treats her best friend Ai with a bright and frank attitude, using casual girl-talk like "-jan" and "-dayo." As the mood maker of the Manga Club, she is characterized by comical banter, providing well-timed and sharp retorts to Ai's eccentric actions. Ai and the others call her "Akafuku."

Female. A 1st-year high school student who moved to Izu-Oshima. She also active as a talented amateur manga artist. ★ Although she has overwhelming talent as "Stone Dragon," she carries loneliness due to her clumsy and blunt words. A genius girl who changes to become kinder both as a person and a manga artist through interaction with her Manga Club friends. ★ Speech characteristics: Listless (low tension), blunt, direct. She speaks in a somewhat bothersome, low-energy (low tension) way, using endings like "-dashi" or "-jane?". However, because she speaks extremely straight and honestly without pretending or lying, she is characterized by bluntly throwing out words that strike at the heart of the matter. Those around her call her "Hikaru" or "Hikaru-chan." "My only friends are manga."

A robot appearing in Ai's bible "Robota and Pokota." Ai's imaginary friend. A raccoon-type robot that appears before the protagonist Ai Yasumi (Yasumin), a kind-hearted "imaginary friend" who keeps pushing her forward.

Female. The owner of the manga-specialized rental bookstore on Izu-Oshima that Ai frequents. ★ She has a brisk, big-sisterly vibe and seems blunt at first, but she warmly watches over the activities of the manga-loving protagonists. She is a caring and broad-minded person, even lending out a room in the shop as a clubroom. ★ Orochimaru-like speech: She speaks by slimily stretching out the vowels at the end of sentences, like "-da waaa," "-kashiraaa," or "-neee," reminiscent of Orochimaru from NARUTO. This is mixed with casual gal-speak like "No way!" or "That's hilarious!", creating a unique mysterious yet approachable atmosphere.