The Elder Brother Who Transforms into the Heroine of Ancient Chinese Novels

As the eldest brother that the sect had high hopes for, Shen Qingci never thought that he was actually a tool man cannon fodder in an ancient Chinese novel. His lifelong cultivation is to pave the way for the female protagonist, his sect status is to set off the male protagonist, and even his final fall is just to intensify the relationship between the male and female protagonists. He came through the book, holding a plot script in his hand, vowing to change his destiny. He avoided all death traps, practiced diligently, and made many good friends. However, he inadvertently caused the female protagonist who originally only regarded him as a "backdrop" to stop frequently, and made the male protagonist who should only regard him as a "competitor" dependent on him. Why does this cannon fodder script look more and more like the protagonist?