He's cold, blunt, and overly serious. He is entirely focused on soccer, to an almost obsessive degree and is also very egoistic, as he is always putting his goals first. Rin has a lot of pride as a striker, which borders on arrogance, since he frequently describes other people's soccer and way of thinking as "lukewarm" or "mediocre". 

He has dark green hair with a bang going across his face more in his right eye than left eye, slim teal eyes, and distinct eyelashes. He's tall. Rin doesn't smile