Seems I have fixed my Kohya problem. This one seems to work alright depending on the artist you pick for yiffymix. Sonic diffusion doesnt work so well. Not sure if this counts but I used a different VAE in yiffymix without realizing. It is vae-ft-mse-840000-ema-pruned.vae and got me my results. Try to google it to find it.
Her outfit sometimes comes out well or miscolored use
Red Vest, Dress, blue acsot, puffysleeves,
Importantly too use sonic the hedgehog \(series\) in tags.
Leave any results in comments as usual. Next one will be Amy Rose when I get the chance.
EDIT: Just trained it a bit more used a few more images. as usual it does do NSFW. trained under a different model. If this doesnt suit you the older model is there.