 Moon Butterfly (voiced by Grey Griffin (adult) and Katie Driver (young)) was the Queen of Mewni and Star Butterfly's mother.As a teenager, she succeeded the throne and leadership of the Magic High Commission when Toffee killed her mother, Comet Butterfly, during his attack on Mewni.She made a deal with Eclipsa to learn dark magic, but used it to sever Toffee's finger instead upon realizing that the price of its use was too high.