Kousuke Seto/Relationships

Relationships

 * Kenjirou Tateyama: The adoptive father of Seto, Kido, and Kano.


 * Ayaka Tateyama: The adoptive mother of Seto, Kido, and Kano. He along with Kido, and Kano, were crying while holding a funeral for her. She gave the three of them their hoodies as a way to hide their eyes when their powers would activate.


 * Ayano Tateyama: When they were all younger, Ayano's mother told her to be a "big sister" for Kido, Seto, and Kano. Ayano was happy to befriend all the three of them, which turned out to be difficult as they thought of themselves as "monsters" because of their red eyes and abilities. Eventually, Ayano came up with the plan to create a secret club of heroes. Donning her red scarf, she announced the four of them as heroes and members of a "secret organization" known as the Mekakushi Dan. In Manga Route 2, Seto, along with Kido, Kano, and Marry, severs ties with Ayano after she suggests killing Marry to end their suffering.


 * Tsubomi Kido: Seto and Kido were roommates in their orphanage along with Kano. There, Kido often got annoyed whenever Seto cried, apologized, or spoke politely (keigo), all which he did often, and would even threaten to harm him. The three of them were eventually adopted together by the Tateyama family. Sometime after Ayaka's death, Kido explains to Seto that she didn't like his use of keigo was because her previous family made backhand comments using it, making her policy "friends don't use keigo". The two make amends and Seto adapts his speech pattern into a different variation. They get along quite well and now live together in an apartment with their brother Kano and the part-medusa Marry. In the anime, Kido is shown to know Seto well, commenting that he is a worrywart despite not showing and excusing him to search for Kano.


 * Shuuya Kano: Kano and Seto grew up in the same orphanage together and are childhood friends and brothers. The two shared an extremely close relationship, especially as children. Kano was constantly annoyed by Seto's crying fits, as he used to cry all the time. They both expressed concern over Kido's disappearances and would frequently talk to each other. They both called each other by the first name until Ayano's death. In the fifth novel and anime, Seto goes looking for Kano. He comforts Kano when he breaks down, using his ability to read his mind. They call each other by their first name for the first time in years.


 * Marry Kozakura: Seto first met Marry while wandering around the forest and stumbling upon her house, Marry was afraid that she would turn him into stone. However, he misunderstood what she meant and thought she was shy, and put his headphones on her to comfort her.


 * Momo Kisaragi: He thinks of Momo as a very good and polite girl, as shown from the amusement park chapter. He never thought that Momo was an idol.


 * Ene: He mistook Ene for being Shintaro's girlfriend from an online dating site.