Could someone try doing a vector trace of the right sketch? I'd prefer the other two sketches done too, but the right one is my main interest. Please make sure to preserve details like the frilling on her panties too.
If these at all help, here's the original sketch (without any upscaling or artifact removal):
https://danbooru.donmai.us/posts/321393And here's a non-sketch reference of the character:
https://danbooru.donmai.us/posts/172429 