The heroine has no entity. When she woke up, she found that she existed in a sadistic novel that was being serialized.
She can see the plot that the author is about to write, such as:
"The female protagonist will be hit by a car on a rainy night."
"The male protagonist will misunderstand the female protagonist for ten years."
"The villain will kill his own sister with his own hands in order to stimulate the protagonist to go dark."
But the heroine cannot directly change the words, nor can she jump out and scold the author. She can only intervene in small ways:
Let the glass of water pour three seconds later.
Leave a door open.
Make someone suddenly think of a sentence.
Have a text message sent ahead of time.
Let the male protagonist be silent when he needs to say harsh words the most.
Let the people who were originally going to die survive a little bit.