How the feline club works? I mean the dynamic, as heroes and civilians.
I'm going with MD's rules as always.
Leonina and Bustet would clash with each other a lot.
Lila loves attention so she would try to talk to the media the most, even exaggerate a little - which Alix would find annoying. She wouldn't like action that much and would rather let Bustet and Rogue figure things out so she can do the cleanup. She would take a role as the leader, insisting that, because she's the one to cast the Cure and is a favorite amongst people, she should be the leader. She'd probably feel superior to Rogue because he's a third layer while she is a first.
Alix is pretty aggressive so she wouldn't have the best look in the media, especially if her and Leonina's arguments got out. She would get along with Rogue tho, they'd be pretty good buddies. She'd be considered a threat in the eyes of the public, not only for her attitude but for her Cataclysm as well.
Rogue would try to not escalate the arguments but that usually wouldn't work. Sometimes it would even make things worse so he would just give up after a while. Ivan would just be the mediator in the group and would care about the akuma victims the most. He'd feel a bit bad because he doesn't have the Cure and only one power. That would also make him more compliant with Leonina and Bustet.
Power-wise, Lila and Alix wouldn't do that well.
Lila wouldn't really figure out Brilliance at first and get scared after her first time, so she would only use it if it was absolutely necessary. But that would be more forgiven (to an extent) because she would cast the Cure.
Alix's Cataclym would be massive and devastating and it would take her a while to restrain it.
Ivan would do fine with Prowl, he'd need to work on his space perception so he doesn't turn visible on accident.
The relationships with kwamis are kinda,, complicated? It really depends on how they get the miraculous and the Matter duo (and Fluff) is the only one whose way of getting a holder is the same every time - chosen by Fu (with Tikki's help ofc).
So, Alix wouldn't get well with Plagg at first. She'd find his attitude pretty annoying and Plagg wouldn't trust her that much, he'd hesitate a lot. But after a while, they'd gain each other's trust and would deeply care about each other even if it didn't look like that at first. They'd love to tease each other. She'd get annoyed at him when he calls her his kitten but in a ,, nice way? I can't explain it but it wouldn't be in bad faith from her. He'd probably get nostalgic when they're with her dad.
I could see Luxx choosing to stay with Lila because of her wit, charisma, and perseverance. But like, how would she get him? I don't see her begging him so unless they somehow stumble into each other and the situation forces them to get together, I don't see her even becoming Leonina in the first place.
I have genuinely no idea how Ivan would get Roaar. But they'd get along. Roaar's playful personality would sometimes cause trouble to him and I imagine it'd be hard to hide her from Ivan's sister.
I hope this is at least a bit satisfactory :]