Character
Miss Heinous
Miss Heinous in Star vs. the Forces of Evil (2015), played by Jessica Walter.
Meteora becomes the main antagonist of the latter half of season 3 when she rediscovers her true parentage and background and subsequently plots to take the throne of Mewni from the Butterfly family. In "Conquer", she is reverted back to infancy following her defeat at the hands of her mother Eclipsa.
Read more about Miss Heinous on Star vs. the Forces of Evil Wiki at Fandom