Kang Soo-Jin True Beauty Park Yoo-na True Beauty

Sujin Kang / Kang Soo-jin / Park Yoo-na was a student at Saebom High School. She is currently a social media influencer. Though having a seemingly perfect life, Sujin deals with an alcoholic and abusive mother, a broken family, and bulimia disorder.

Appearance
Unlike Jugyeong, Sujin is naturally beautiful. She has notably small pores, fair skin, and large gray eyes, which she enhances with makeup. She often wears tight-fitting, revealing clothes to show her slim body and voluptuous curves. Her attire is usually from high-end brands. She has long black hair, tall stature, and an identifying mole under her left eye.

Background
Sujin appears to come from a very troubled household. Her father is not mentioned at all, and her mother is depicted as abusive and uncaring. Sujin locks herself up in her room and plays music to drown out her mother's yells. It is hinted that she has bulimia.

Sujin has a very rocky relationship with both Seojun and Suho. Although no information has been given about their shared past, both Seojun and Suho act hostile towards her. She appears to have an unrequited attraction towards Suho, which is the main reason she is antagonistic towards Jugyeong. However, this isn't proven yet.

Personality
Sujin has a personality that is very difficult to like. The fact that she came from a problematic family, among other reasons, causes her to take out her frustration on those around her. She maintains a nice girl image in public and uses her beauty to manipulate others. When she discovered that Jugyeong and Suho became acquainted, Sujin quickly befriended Jugyeong to learn information both about her and her association with Suho. Viewing Jugyeong as her love rival, Sujin attempts to sabotage her both socially and romantically.

Though she has a bad attitude, Sujin is vulnerable and insecure about her past. She never opens up about her family life, and was horror-struck when she encountered her ex-friends. She is constantly fishing for compliments and assurances to reaffirm her beauty.