Sarah Choi

Sarah Choi is a side character who is involved in majority of Jumin Han's route, and can be considered as one of the two antagonists in the events of his route; the other being her sister Glam Choi.

In Jumin's route, his father, Chairman Han, declares his intentions to marry Glam Choi, and expresses wishes to make Sarah his son's fiancée.

She had an operation for plastic sandals and she tried to kidnap Jumin Han from MC (she's a stalkerfan), but she doesn't love him, she just wanted his money. She also wanted to have a threesome with her, Jumin and MC.

Personality
Not much is known about Sarah's true personality other than her greed when it comes to money. She seems to be very loyal to her sister, Glam Choi, and is willing to go through tedious tasks to get what she wants. Sarah doesn't seem to be afraid of flaunting her looks and position, calling herself Jumin's fiancee.

However, she becomes extremely defensive when her reputation is on the line, to the point of threatening to sue those who write bad things about her.

She portrays herself as an upbeat woman, very cheerful and caring. When talking to those other than her sister, she displays a fake persona. She seemingly pretends to act hurt and defeated when her advances on Jumin don't work, though sometimes making joking remarks at how cold he is towards her.

ALSO

She is sly, materialistic, greedy, loyal (only to her sister), defensive when she's about to lose, fake and two-faced cancer.

Jumin Han
She wants to kill him and save his money. Also she wanted to kidnap him and do harassment on him.

Chairman Han
She loves Jumin's daddy.

Glam Choi
Her sister.

Elizabeth 3rd
Sarah doesn't like her and has questioned why Jumin bothers with a cat, because she gets fur everywhere. She kidnap her and made her eat salad in basement.