Rin Itoshi is a contender of Blue Lock. Rin is the younger brother of Sae Itoshi, who started playing football with him at a young age. He has played as a forward on every team he was on and has always been regarded as one of the top players. 
Rin's main goal is to become the world's best striker. He used to be fixated on defeating his brother in football and in turn, getting revenge for abandoning their shared dream, but after he let go of his and decided to change defeating anybody in his path