 Eclipsa Butterfly (voiced by Esmé Bianco) is a former queen of Mewni (known during her reign as the "Queen of Darkness") and was assumed to be an ancestor of Star and Moon Butterfly before their true lineage was revealed.Three centuries before the events of the series, Eclipsa was imprisoned in crystal for the use of "dark magic" and eloping with Globgor, a monster; while her child, Meteora, was replaced with a Pie Folk girl named Festivia, who is the true ancestor of Star's bloodline.When the kingdom was attacked by Toffee, Moon made a deal with Eclipsa to learn a forbidden spell capable of killing him in exchange for her freedom.