The heroine is the time-travel version of Brother Ying
Yes, that's Naruto's Sakura brother
The heroine's soul passed through Brother Sakura, promoted the construction of spiritual civilization in the ninja continent, fought four wars, became a Hokage, and finally peacefully liberated the entire continent.
Afterwards, he was in the literary field and shrunk. After discovering that the literary giants in history were not doing their jobs properly, he inspired him to change his career. As a result, he became a literary giant of the generation.