An ambitious idea to train both forms and outfits of the character, using a very small dataset, on the CivitAI onsite LoRA trainer.
Verdict: Success!
As it's multi-concept, I did not do much tag pruning, and so, here are the most useful tags for each form:
Yaana (face): yaana, 1girl, miqo'te, dark skin, feline eyes; Optional: hair ornament, pink hair, multicolored hair
Yaana (outfit): cropped jacket, midriff, red shorts
Black Cat: blackc4t ,furry female, muscular, pink hair pink cat ears, black fur, body fur, claws, bodysuit, fur trim