Da-Jeong is someone with a straight heart who can't pass people in need and can't stand injustice. She is also a thoughtful student who often takes care of her aunt, who is currently being hospitalized.

Spoiler

Her parents died in a car accident and she suffered all kinds of humiliation and bullying. Because of that, she is capable of self-defense, enough to subdue an adult man.

She is in judo club.