Aiichiro Nitori/Story

Season 1
While running with Rin, Rin says to Aiichiro that he didn't know there was going to be a joint practice with the Iwatobi swim club. Aiichiro tells Rin that the captain made the call, and mentions that the club's team members all have girly names. However, he immediately cuts himself off after Rin glares at him and is reminded that Rin also has a girly name, to whom he quickly apologizes to. When Rin asks him how does he know, Aiichiro tells him he was in the same swimming competition as them and says that the race was amazing to watch.

Season 2
In season 2, Aiichiro is assigned a new roommate, Momotaro, who will later become one of his best friends. At first, he is disappointed because he enjoyed sharing a room with Rin, but he and Momotaro become really close later on. When Momotaro's time made it onto the Samezuka relay team and his didn't, he was at first really disappointed. However, Aiichiro made a promise to him that he will make his swimming time better so that he can swim in the relay with him and Rin.