I think Vegapunk's dialogue (assuming he's just speaking through this girl/android) strongly implies he's definitely an enemy, and not a secret RA member lol
I'm also curious if the SSG (including this girl) are just androids/pacifistas meant to house Vegapunk's brain capacity or some shit lol. So he has like 6 of these things, but they are all effectively him.
Pretty dark if thats the case