After seeing the art wis made for the kpop demon hunters au I have some ideas based on her interpretation
As the visuals Lila has the largest wardrobe and most makeup and an expansive collection of wigs so she can always look good on stage
Alya is the one most excited for the whole double life thing of being a pop star and a demon hunter, Lila would prefer to have just been a pop star and claudia would prefer to just be a demon hunter
When adrien and his boyband do their first public performance and the girls catch on to what they really are Lila and alya have to hold claudia back from attacking the boys, Lila because she refuses to let claudia ruin her public image by assaulting a biyband mid performance and getting on the news, alya because she understands that the situation is too public and they can't risk revealing the existence of demons to the masses if they want to keep it under wraps
Sabrina is 100% in the crowd at the boyband performance and is definitely one of the first to fall for their ploy, becoming a day one superfan
Since the Boyband has an angel aesthetic, during they're big stage performance they got black wings and feathers as apart of their "costumes"
If sillynette is in this au she 100% is apart of another group and is trying to get with adrien
If it's normal marinette she handles the girl's costumes and is often exasperated because she wants to know exactly how a pop group can wreck so many good outfits
That's what I got for now, add or remove things at your leisure if you think it would work better
Claudia perreault belongs to #wisteriasymphony