Haha that's so cute! Love that they're real enough that you feel like you know them. Their jobs have been mentioned here and there but in short, Kaya is a Ph.D candidate, Nari is a surgical resident, Miso is an assistance producer at Hybe, Chaeyoung works at Conde Nast as an analyst (but wants to become a columnist), Sooah works for an event planning firm, Dilara is a F1 racer, and Lia is in marketing at Hybe.
I think they're all pretty, despite looking different. I guess Kaya and Lia would probably be the most conventionally beautiful, the kind that would get a double take from strangers. Nari and Chaeyoung I imagine are more girls-next-door, where they're cute but get prettier over time if you pay attention. Sooah, Miso and Dilara are probably not head-turners, but are girls whose personalities and distinct aura (party girl, mysterious and aloof, famous athlete in a glamorous European sport) make them super attractive. In case you're interested, I did add my imagined faceclaims here along with brief bios about their characters.