Per everyone's feedback, I tried making several loras the proper way with video clips (instead of just images) and training the audio.

I think this did a pretty good job at capturing Super Girl's voice. It even uses her voice on an alternate art style.
What you all think?

"Official style" will produce the style from Justice League Unlimited.

"Shiny skin" in the prompt will produce the other style.

Also I had a super difficult time getting CivitAI to accept my prompts because apparently Superman related prompting activates the "Prompt blocked as it may violate TOS, real person detected in prompt" error. If you are having issues with this try removing superman related descriptions... but kind of defeats the point of the lora 😭