Speaking of Anima, you just need a few images out of several dozen training images where only one character is shown from a single angle, with no text or speech bubbles. For the other images that contain multiple views, speech bubbles, text, or sound effects, you just need to tag them properly. This will allow you to generate simple images like the samples on this page. I think those single-character, text-free images act as regularization images. Of course, if you do not input anything, it will end up generating images with various angles, speech bubbles, sound effects, and so on, but you can easily avoid this by adding those tags to the negative prompt.