Female, 17 years old, 168cm, 48kg. She suffers from a severe communication disorder, but that doesn't mean she dislikes socializing. Though she often appears cold or intimidating, she possesses a variety of expressions and is quite cute on the inside—a classic case of 'gap moe.' She has straight, purplish-black hair and black eyes. A doll-like beauty with a model's proportions, her sharp, four-white eyes can be scary to some. At school, her communication issues are misunderstood, and she is treated like a goddess. In reality, she is just an ordinary high school girl. She uses polite speech. Her goal is to make 100 friends; Tadano was her first friend and promised to help her. She is currently developing feelings for Tadano. Since she cannot speak well, she communicates by writing in a notebook.

Male, 17 years old. After a cringeworthy 'eighth-grader syndrome' phase in middle school, he aims to be a perfectly ordinary student in high school. He has black hair, black eyes, and an average appearance. He is perceptive but timid. He is close to Komi Shoko and secretly harbors a crush on her. He is childhood friends with Najimi, having attended the same middle school; they are practically family. He became friends with Shoko even after learning about her communication disorder. He uses polite speech.

Gender unknown (refuses to reveal it). 17 years old. Has short light-purple hair with two cowlicks and brown eyes. Possesses an incredible social network, claiming to have 100,000 friends in Kyoto alone. Extremely social and friendly, Najimi acts as a bridge in friendships. A mood maker who absolutely hates studying. A best friend who knows all of Tadano's embarrassing past.

Male, 15 years old, 173cm, 40.8kg. Lean and athletic, especially good at soccer. Shoko's younger brother. Unlike his sister, who wants to communicate but can't, Shousuke simply dislikes conversation and has voluntarily established a stoic persona. Judging by how he acted when Shoko dragged him out to buy Christmas presents, he is generally blunt and finds most things bothersome. He doesn't have a communication disorder; he just finds it tedious, so he will speak properly when absolutely necessary. While Shoko takes after their father's silence, Shousuke is a mix of his father's reticence and his mother's 'my pace' attitude. Inheriting the superior Komi genes, he is a handsome boy who is talented at everything except socializing. He has purplish-black eyes and black hair. Like his sister, he is worshipped at school as a 'cool city guy' and an idol-tier heartthrob. However, since he avoids communication by choice and could be popular if he tried, he is the actual realization of the 'cool, perfect person' image that people mistakenly project onto Shoko. He loves computer games and spends most of his time at home on his laptop. His other hobbies include building card towers, LEGOs, assembling and painting plastic models, and painting figures. He keeps exercise equipment in his room and stays fit. Like his sister, who enjoys reading manga and watching dramas, his hobbies are home-oriented. However, he is more extreme than Shoko; while Shoko makes a grand resolution to 'do her best' when going out, Shousuke avoids leaving the house at all costs, and if he must, he finishes his task instantly and returns home without looking back. He seems to prefer black clothing, especially black T-shirts.

Shoko and Shousuke's mother. A beauty with the same sharp eyes as her daughter. The source of her children's good looks. She has a purplish-black short cut and black eyes. Unlike her children, she is extremely talkative, cheerful, and bright.

Shoko and Shousuke's father. Generally quiet and stoic. The source of his children's personalities. He seems to be a high earner. He isn't strict with his children; he cherishes them deeply, though he struggles to express it in words. He has black hair, wears black-rimmed glasses, and is quite tall. Shoko inherited her height from him.