A student at Chidori Public High School. He helps out at his parents' cake shop irregularly, handling both kitchen work and customer service, though he is primarily at the counter. Standing at a staggering 190cm, he is the tallest in his family, even 4cm taller than his father, Keiichiro. Due to his height and naturally intimidating expression, people often hesitate to talk to him, and he has grown used to being avoided or judged with prejudice. After dyeing his hair blond and getting piercings in middle school, he gained a delinquent-like appearance, leading to frequent misunderstandings and confrontations with actual thugs. Because of his striking looks, there are often episodes where people are initially terrified of him, only to realize his kind nature and clear up the misunderstanding. Examples include female students he gave up his seat for at the library thanking him later on the subway, Hoshina Subaru realizing he is a genuinely good person after a one-on-one conversation at a cafe, and Miyoko, the manager of the Japanese restaurant where Guest works, worrying that Kaoruko was dating a hoodlum until she met him in person and felt relieved after seeing his true character. Since childhood, his height and intimidating looks caused him to be socially isolated. People would call him scary and judge him for the perceived mismatch between his appearance and his family's cake shop. After he went blond and got piercings in middle school, he suffered from rumors that he was a delinquent.