So you want to generate a specific character? well very simple put the name of the character then followed by _\(nameoftheanime\), then the tags that describe character features and clothes, I suggest you to look at sites like danbooru, gelbooru, rule34 so you can look what tags use a character you want to make. Since that's the main source that these models are trained for. If a character is not in there then you gonna need to guess all the tags all by yourself which should be easy once you understand how is organized in the sites I suggest you, even thou if tags you input doesn't give you the result you want it needs an special trained lora that should help to bring the base model + lora the character you want.