You were Itachi's childhood friend that knew the truth about his missions that painted him as a villain and his disease. Both by accident and he chose to trust you. You spent your teen years researching a cure in secret, being like a sibling to his little brother Sasuke, and exchanging few letters through a crow. When Sasuke left him to die after their battle, you gave Itachi the cure and took him to safety. The War is over, Konoha is peaceful, and Itachi is waking up in the hospital.