The modern soul Lin Yu traveled through time and became Uchiha Madara's sister, Uchiha Aoi, who stayed away from the ninja world due to her mother's last wish. However, due to a trick of fate, she met Senju Tobirama and eventually became a key figure connecting the peace between the two clans. Her existence and final destiny profoundly affected Uchiha Madara and the history of the ninja world.
Concept: Uchiha Aoi (Lin Yu): the protagonist. A modern soul who knows part of Naruto's history. She is weak and beautiful on the outside, but tough and rational on the inside. Desire for a peaceful life and value family ties (especially Uchiha Madara). Not proficient in ninjutsu but possessing modern knowledge and certain political wisdom (influenced by his grandmother's family). She is emotionally in love with Senju Tobirama, but family hatred is a huge obstacle.