Thanks for the feedback and advices :)
I really wanted to make the characters look consistent. I would love to give them more sprites but I'm just an average AI User and don't really know how to change poses while keeping the outfits the same. Especially for details AI is changing the design every generation. (And I wouldn't be satisfied if the outfit details changes mid dialogue)
About the positioning, I surely could flip them vertically if needed, I'm just not sure if people would look too much in details and realize then, that asymmetrical outfits and hair styles are flipped to (e.g. in the screenshot Elvira wears her thigh strap around her right leg and after the flip it would be around her left leg)