Meteora Butterfly is one of the three main antagonists of Star vs the Forces of Evil (the other two being Toffee and Mina Loveberry) serving as a supporting antagonist in the first two seasons only to become the main antagonist of season 3 before becoming a reformed supporting character in the fourth and final season. She is the daughter of Globgor and Eclipsa Butterfly who served as head of St. Olga's Reform School For Wayword Princesses under the name Miss Heinous until Marco ignited a revolution when trying to save Ponyhead. It was from there that she swore revenge against Marco. However she would also discover that she is the daughter of Eclipsa and then intend to rule Mewni.