I conclude that Pi Seunghee is so far the only likable main character and she's a baddie.
Han Na became a reckless mess, Young Ro became frustrating, Soo Ho is annoying, Gang Moo is annoying as well, Boon-ok is a bitch, and Cheong Ya we do not know much about her.
I'm so confused with the political and spy part of the drama, I think it's not properly written as of now. The dorm part where Young Ro, 207 girls, Pi Seunghee, The Old Man, and Boon OK are more interesting to watch tbh.
and also the cafeteria lady is seen on the huge character poster of the show so maybe she will have a larger part?
Pi Seunghee said that the NSA are labeling/framing alot of people NK spies to create good results. So I think it's safe to say that the NSA is one of the main antagonists of the story.
I hope Ep. 4 and 5 show more of Kang Cheong Ya because as of now she has not been shown as much as the other main characters. The main characters, Young Ro, Soo Ho, Boon Ok, Seung Hee, Han Na, and Gang Moo have a lot of screentime except from her. With this, maybe she has a detrimental/important part in the second half and last half of the series.
and also the cafeteria lady is seen on the huge character poster of the show so maybe she will have a larger part?