Lora of Supergirl from DC Tomorrowverse animated universe.

Main trigger is: supergirl

For main outfit try: thighhighs,thigh boots,blue top,long sleeves,red skirt,classic superman logo,cape

If you are willing to do the view from behind try moving classic superman logo to negative prompt.

For her Kryptonian outfit try: ponytail,krypton suit, krypton bodysuit, blue superman logo (this gives inconsistent result, especially when it comes to superman logo, but worth trying)

Same, if you are willing to do the view from behind try moving blue superman logo to negative prompt.

I used weight around 1, but if you are using another Lora's or want some specific composition, you can lower the weight.

Lora messes with background pretty often, to avoid it, try putting futuristic in negative prompt