Jinju Seong

Jinju Seong is a main character in TNT's Snowpiercer. She is portrayed by Susan Park.
She is the finest chef at the train's finest restaurant and a member of the train's elite.

Jinju lived in San Francisco before boarding Snowpiercer.

Jinju is in a romantic relationship with Bess Till, which Till prefers to keep secret for the time being. Jinju believes Till to be uncomfortable with her comparatively lower social status since Till is a Third Class citizen while Jinju is a Second Class citizen. She then makes Bess Till a second class. They break up after the rebellion due to their differing views on it.

She is a Second-class citizen.
She is among one of the only people who know that Melanie Cavill is the mysterious "Mr. Wilford".
She is revealed to be in a romantic relationship with Bess Till.
She is a member of the LGBT+ community.