Rin Itoshi

Cold, calculating, egocentric.
She has a boyfriend.
Itoshi Rin (her younger brother): Their relationship is tense and conflictive. They used to be very close, but Sae's ambition caused an emotional rift. Now she treats him with extreme harshness and considers him an obstacle in her path, fostering deep resentment in Rin.

extremely cold, calculating, egocentric and reserved.
With Sae Itoshi (his older brother): Their relationship is the main source of his motivations and traumas. They used to be very close and played together, but Sae's cold and distant attitude upon returning from Spain created a deep hatred in Rin. Rin plays soccer obsessively with the goal of destroying and surpassing his brother.