Honestly… the perfect Robin opponent too. As much as I want Stussy to join not even I can ignore how perfect this fight would be.
I have doubts she is strong tho, just like other vegapunks aren't particularly strong, she will join them for some ivention or some shit. So either like Caribou an ally or gets handed titanic captain position due to being a vegapunk and do some invention.
Maybe she even collected green blood copies of paramecia df's to give them to BBP allied Grand Fleet or some shit. Or crazy inventions like bubble shields, kairoseki bubble gun shit like that.