Sariel canonically loves black cats, Hiiro IS a cat, Azure has a lot of lynx references to her so she'd either have an actual pet lynx or a Maine Coon/Norwegian Forest Cat, and Reinhardt would get some feral wild predator that's bound to give someone rabies and still call it her fluffy little baby.

Sharona would like dobermans but wouldn't get one because she already has 2 cat GFs and they wouldn't like that, Irridon loves all animals equally and so does her girlfriend Nemesis (y'know, justice and all, it'd be quite unjust for the other animals y'know), Bethlehem has dragons but I think she would like majestic floofs of all types, Victoria is 100% a cat person, Uriel, Areia, Eve and Revy are cat owner friends and have a cat lover GC, Hedy would like cats, Naroxel loves all animals in canon because RAISHUZEN TO TOMO NI!, Sikare IS a cat, Casta has a cat, Florine and Erica ARE cats, Fleur would have a cat that he'd infodump to, Gram is 100% a big doggo lover, Charon would have a cat to match his eccentric-ness, Sinsa would like dogs, Roy would also like dogs, and I'll end the essay there.