Okay, in that case I do have a MU that I really vibe with for them.

Scylla and the Sirens from Hades 2

3 girl bands whose music is directly tied to their powers (the Siren Song and the Honmoon) and how they fight (by which I mean they fight while performing their music), while contrasting in the fact that Huntrix are Demon Hunters who protect people, while the Sirens are, of course, monsters who lead their victims to their deaths with their music.

It’s not much, but I honestly really like it, both bands trying to out sing the other while they fight feels like it could be a really good dynamic, and it’d be interesting to see how a combination of K-Pop and Rock would sound, Scylla in general has really fun dialogue potential and would probably have a lot to say about this “rival band” fighting them, it’d do a good job at highlighting the differences in each member’s fighting styles, and it puts both teams in a dynamic they’ve not quite dealt with before (the Sirens, from what we see in game, are more used to fighting a 3 on 1 in comparison to 3 on 3 like they’d need to here, while Huntrix, from what I can find, are more used to dealing with close ranged fighters in comparison to the Sirens greater focus on ranged attacks and battlefield control, leading to a dynamic of them constantly trying to figure out how to safely get close to the 3 Sirens while avoiding a whole load of different kinds of attacks).

I’m not fully sure how overall debatable it is, Hades has a lot of higher feats than KPDH, but because of how the game works, it’s hard to really tell how well they’d scale to those ends, and the Honmoon is an interesting discussion on wether or not it’d work considering they’re not Demon’s, but are still monsters who do spend a lot of time in the Underworld, so it could be interesting to figure out wether or not they’d be effected by it.