Try using "kiryu coco \(1st costume\)" instead of just "kiryu coco" and removing "dragon tail"
Why is she burned? It seems the pony model already knows her, but it doesn't know how to draw her tail. Lora learned her tail, but the "dragon tail" tag is too strong, it even turns dogs and pigs into dragons:
https://litter.catbox.moe/81waqe.jpg 