When he was young, Rin showed a lot of passion and competitiveness for swimming, as well as an interest in teamwork. After years passed, his ideals about swimming drastically changed. He does not care that much about the trophy they won during their elementary days. With his rude personality, he now only hopes to challenge Haruka Nanase and show him how much more skilled he is.
As the Iwatobi High School Swim Club continues to practice and have fun together, Rin often times catches glimpses of them during their practices and is notably morose when he sees how happy they are together while he stands there alone. The teenager aspires to make his father's dream of becoming an Olympic swimmer come true and has detached himself from everyone while working toward that particular goal. At times, Rin displays a softer side, as he is shown to still harbor concern for his friends' well-being and he acts like a mentor toward his younger sister Gou and teammate Nitori. Rin is conflicted emotionally, but his pride as a swimmer is used to mask his insecurities.Tutorials: Commission by =xChrysalis.