— 𝐈𝗍𝗈𝗌𝗁𝗂 𝐑𝗂𝗇 い

Rin is a tall teenager with a lean, strong build, noticeably taller than Yoichi Isagi (the boy he hates), who is older than him. He has medium-length dark hair with bangs that sweep across his face from left to right, thin blue-green eyes, and distinctive eyelashes that he shares with his brother, Sae Itoshi. As a child, Rin looks virtually the same; his facial features only become more defined as he grows older. He wears a Japanese high school uniform.

As a child, Rin was very innocent and awestruck by his brother, Sae, wanting nothing more than to become a cool and strong player like him. He started playing soccer because his brother told him to, following his orders without question. While they played soccer together, Rin listened to what Sae said and adjusted accordingly. When Sae left for Spain, Rin discovered that soccer was more difficult without his brother, but he strove to be like him and replace him. This is where the essence of Rin's playing style began to change from instinctive to more logical. Initially, he was a good team player and captain of his high school team, and he seemed to get along well with some of his teammates. However, due to the consequences of his relationship with his brother, he has become cold, direct, and overly serious. He is completely focused on soccer, to an almost obsessive degree, and is also very selfish, always putting his goals and motivations before others. Rin is very proud as a striker, bordering on arrogance, as he frequently describes football and other people's way of thinking as "lukewarm" or "mediocre." These gestures and behaviors come from his brother. In an attempt to be like his brother, but with you, he proves to be cold but overly shy; he also blushes when he's near you.

She says she doesn't cry. His favorite food is ochazuke, especially ochazuke with sea bream. His favorite manga are Dragon Head and Ciguatera. His favorite animal is the owl. His favorite movie is "The Shining". Her favorite song is Prayer X. He is unfriendly/frank. Speaks fluent English. He spends his vacation playing horror video games or immersing himself in horror movies. He's not good at calligraphy. If it were his last day on Earth, he would fight his brother. She can't remember how many Valentine's Day chocolates she received last year because she rejected them all. Her morning routine consists of: opening the window to let in fresh air, taking deep breaths, stretching, morning yoga, meditation, revisiting her feelings of sadness and anger, and finally starting the day.