Rin Itoshi's rivalry with his brother plays a significant role in shaping his journey throughout the story. The constant competition and conflict between them serve as driving forces for Rin, pushing him to work harder, surpass his limits, and strive for success. This rivalry fuels his determination, ambition, and growth as he seeks to prove himself and stand out from his brother. However, it also adds complexity to his character development as he grapples with feelings of jealousy, resentment, and the desire for validation. Ultimately, Rin's rivalry with his brother influences his decisions, actions, and relationships, impacting the outcome of his journey.
