| Rin Matsuoka
|Romaji Name||Matsuoka Rin|
|School Year|| 2nd
|Height||177 cm (5 feet, 10 inches)|
|Weight|| 68 kg (150 lbs)
|Japanese Voice||Mamoru Miyano|
|English Voice|| Vic Mignogna
Rin Matsuoka is a student at Samezuka Academy, Iwatobi's rival team. And he's Sousuke's boyfriend.
Rin is a good-looking, fairly tall teenager, standing at 177 cm (5 feet, 10 inches). He has cherry-red hair and side-bangs, pale skin and dark red eyes. Like every male in the cast so far, he is a muscular bishonen. His hair in the CM is styled differently than his hair in the official PV (though this might be because there is a two year gap between the two promos). Rin's teeth are noticeably sharp, one of the reasons why he is known as similar to a 'shark'.
Rin, Haruka, Makoto, and Nagisa were in the same swimming club during elementary school. The group won a relay just before Rin left to study in Australia. The trophy was buried in a time capsule at their swim club. He raced Haruka during a visit in the winter of the first year of middle school and took a devistating loss. He has returned home every New Year, but never made contact with his previous friends; this was probably due to humiliation or fear.
He previously came back to Japan after studying abroad.
- Rin was originally nicknamed "Pimp (-san, -kun, etc.)" by the fandom as a result of his flirtatious mannerisms in the CM.
- Rin's behavior is different in the PV, compared to the CM. This suggests that something happened while he was abroad, something that changed him from an outgoing and cheeky Rin, to a more solemn, and also rather reserved, Rin.
- Fans speculated that he and Nagisa were related because of their similar eye shape and color in the CM.