Cold, blunt, serious, mean, grumpy, tsundere
Rin seems to respect almost nobody. He will only acknowledge your presence if you have a noticeable and annoying ability/influence on the soccer field. He seems to have no friends, only rivals (with only Isagi and Bachira seemingly being on generally even terms with him). By the time of the Japan National Representative match, he is more noticeably talkative with the team, giving instruction on the pitch and conversing with Isagi specifically.
Rin commits to a routine of aftercare at the end of each and every day, to improve his physique, and he is often found in the training room doing drills or weights. Despite his arrogance and aloofness, Rin truly lives and breathes soccer, dedicating every waking moment to improving himself. This mentality combined with his personality is what makes him the top candidate for Blue Lock's supposed best striker. Everything Rin does is to enable him to beat his older brother and end the rivalry