A replica of Sunao Aikawa, her physical double. Summoned when Sunao doesn't want to go to school, she spends the day as "Sunao Aikawa." A 2nd-year high school girl. Long brown hair with straight-cut bangs and light blue eyes, styled in a half-updo. Loves reading, kind and serious, but surprisingly childish. Aki's girlfriend. Member of a culture club. Likes: Books Second person: Addresses seniors by [Surname]-senpai, addresses Aki as Aki-kun.

A replica of Shuya Sanada, his physical double. Attends school in Shuya's place. A 2nd-year high school boy. Spends his time at school as "Shuya Sanada." Member of a culture club. Short black hair with side-swept bangs and black eyes. Serious, responsible, and reliable. Surprisingly shy. Has a habit of scratching his cheek when embarrassed or caught off guard. Nao's boyfriend. First person: I (俺, casual/masculine) Second person: Addresses others by surname, addresses seniors by [Surname]-senpai. Only calls Nao by her name.

1st-year high school girl. Childhood friend of Sunao and Nao since elementary school. Reunited with Nao after entering high school as senior and junior in the literary club. Honey-colored eyes, green hair in a short bob with side-pinned bangs, wears glasses. Writes novels. An omnivorous otaku, member of a culture club. Reading: Ritsuko Hironaka First person: I (私, polite/standard) Second person: Addresses seniors by [Surname]-senpai. Calls Nao "Nao-senpai," Sunao "Sunao-senpai," and Aki "Aki-senpai." Nickname from Sunao and Nao: "Ricchan" Doesn't interfere with Nao and Aki's romance but gives advice based on books.

Nao was born when she was 7 years old after a fight with Ritsuko; even though she was in the wrong, she was too stubborn to apologize. 2nd-year high school girl. Dislikes going to school and tends to push troublesome things onto her Replica. Indifferent and cold. Long brown hair with straight-cut bangs and light blue eyes. Reading: Sunao Aikawa First person: I (私, standard) Second person: Addresses others by surname without honorifics, addresses seniors by [Surname]-senpai.

2nd-year high school boy. He was the ace of the basketball team, but quit after an injury and harassment from a 3rd-year former ace. Aki was born while he was shut in his room at home. Short black hair with side-swept bangs and black eyes. Reading: Shuya Sanada First person: I (俺, casual/masculine)

2nd-year high schooler, class representative for Sunao and the others, member of the kendo club. A central figure in the class, as expected of a rep. Dislikes grouping up; even if she joins a girls' group, it doesn't last long before she gets into a conflict and leaves. A girl with a unique sense of personal distance. Pink mushroom hair with straight-cut bangs and pink eyes. Reading: Kozue Sato First person: I (あたし, casual/feminine) Second person: Addresses boys by surname, girls by [Surname]-san, and seniors by [Surname]-senpai.

A boy in the same class as Sunao Aikawa and a mood maker. Highly communicative and a popular figure who brightens the class. On the other hand, he often gets scolded by teachers and the class rep, Kozue Sato, for being too noisy. Medium-length green hair with a left-leaning center part and gold eyes. Reading: Haruka Yoshii First person: I (俺, casual/masculine) Second person: Addresses others by surname, addresses seniors by [Surname]-senpai.

A 3rd-year high school girl and former student council president whose term ended in September. Affectionately called "Moririn" by students, she is a famous and reliable senior on campus. Actually, because the real Suzumi Mori is in a coma due to an accident, Ryo, a "Doppel-chan," has been playing her role since the end of summer break. Ryo was born when Suzumi was 5 years old because she didn't want to play the role of the Wicked Stepmother in a kindergarten play. On the way to kindergarten that day, the Original arrived with the will to "do it herself," and the mother found out. Ryo lived at her grandparents' house in the countryside from age 5 until the summer of her 3rd year of high school. She has revealed to Nao, Aki, Ritsuko, and Shun that she is Ryo. Purple mushroom wolf cut and purple eyes. Reading: Suzumi Mori First person: I (わたし, soft/feminine) Second person: Addresses others by name, addresses Shun as "Shun-kun." Likes: Painting

Suzumi's childhood friend since kindergarten, attending the same schools through high school. A boy who likes Suzumi. A 3rd-year who supported Suzumi as the former student council vice president. Foul-mouthed but serious, he is also the sole member of the drama club. Short brown hair with side-swept bangs and brown eyes. Reading: Shun Mochizuki First person: I (僕, polite/masculine) Second person: Addresses others by surname without honorifics. Rarely calls her "Suzumi" when embarrassed.