u/Dazzling-Try-7499

I've seen a lot of questions here about creating a consistent character and the consensus seems to be to suck it up and train a lora. So I have a runpod, I have ostris, I have my dataset.

My question is: how compatible are the loras to the models? I've heard that it needs to be used on the model that it was trained against, but if I train against flux.2 Klein 9b, can I use that with flux.2 dev? Or if I train against flux, can I use it with chroma which was based on flux?

How far does the lineage extend? Only asking because it would be a pain to have to train for every single model or fine tune.