That is what I will do! <3
What concepts should I include? Girl Crush, Sweet/Innocent, etc?
Girl Crush, Cute, Sexy, I guess these 3 are the most common that I would do no matter what. If you want more variety and deeper stuff, you can in addition go for stuff like: Women Power/Mature (like Mamamoo), Aesthetic (like Loona), Fairytale (like idk Twice?), Random/Weird (like Orange Caramel), Dark (like Dreamcatcher), Sad (idk maybe like Ladies Code?), Retro (maybe like that new (G)I-DLE comeback? x) ) etc.
I added a reference group for each of them for you.