>>108774319She probably killed billions honestly.
It depends on how many dimensions there are, assuming there's a basically infinite amount and most of them have been shown with magic, we can safely assume that Star committed genocide on a scale that is basically immeasurable. Honestly I only like the series more for this. The series finale had no clear antagonist, as Mina took a backseat. I have come to realize that Star is the protagonist in her own show, but the antagonist in everyone else's. She wanted to be with Marco so she killed an innumerable amount of people and cucked several both directly and indirectly, and then she broke the laws of reality for their universe to bring together both of their worlds after she was separated from him.
Star is the single best and most powerful character to come out of the Renaissance era of cartoons. She is an unironic chaotic evil and an ultimate tier villain who puts every other villain to shame. 10/10, best girl, best series.
Thanos ain't even got shit on Star Butterfly.