>>942110515
firstly you should learn the character tag from the booru your model is trained on: tails_(sonic) on danbooru or miles_prower on e621, or if you're using a lora make sure you have the activation tag
secondly you should learn compositional tags from the booru your model is trained on e.x. "1boy, 1girl, hetero" or "male, female, male/female, duo". you have "solo" in your prompt which is used on danbooru for only one character
thirdly, without using regional prompting you can use BREAK syntax to tip the RNG in your favor a bit (depending on your UI), e.x.
prompt1/general BREAK
prompt2/char1 BREAK
prompt3/char2