What Does It Mean That I Am the Heroine's Third Personality?

When Ji Jinxi woke up, he found that he had become the heroine in the novel. No, why can't I control my body... Ah, I remember that the heroine in this novel has a second personality, so she traveled through time and became the heroine's second personality, right? Ji Jinxi was so determined. "Hey, who are you? Why are you in Xiaoxiao's body?" Until she saw another self in the conscious space. Ji Jinxi:... What do you mean I am the heroine's third personality? … Sundials, voids, magicians, goblins, gods... When these things in fantasy novels really appeared in front of Ji Jinxi, she finally realized - ■■■■