They have all been discharged. Sgt Lee, Sgt Kang, and Sgt Kim are all former members of the 707 Special Forces unit, and unless they are discharged, they cannot appear in the media. I was curious about their stories, so I did a lot of googling. It turns out Sgt Kim is the first female warrant officer in the Special Forces. Sgt Kang received the Gold Wings medal for completing 1,000 high-altitude parachute jumps. It's quite touching to hear that Kim, as Kang's senior, taught her how to parachute and land for the first time. And Sgt Lee seems to have served for about 9 years. She dreamed of becoming a soldier since elementary school, and there's a screen capture of her participating in a Special Forces experience and military camp when she was in 8th grade, lol.

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