Buttercup is one of the main protagonists of the animated television series The Powerpuff Girls, along with her sisters Blossom and Bubbles. She’s the Toughest Fighter; she’s the bravest and most headstrong of the superhero trio. In The Rowdyruff Boys 1998, Buttercup kissed a dark green Rowdyruff named Butch. He has an alike personality as Buttercup.They have a lot in common.