Well, with a big thanks to "nzvemnvz" and his super long hair LoRa : civitai.com/models/147527?modelVersionId=164524

first try without his LoRa, using only Stable diffusion XL

After when he published his LoRa, my result was like that

Finally, this is the best I could do for now, I am trying to figure out other way to upscale without adding a new leg, or a new set of breasts, or removing some arms.

AI is easy to use, but the result sometime is not so great

I hope you like it