Eclipsa Butterfly (also known by her title The Queen of Darkness) is the potential Bigger Bad of the Disney TV series Star vs. the Forces of Evil.
She was introduced as the Darkest Monarch in the Butterfly Dynasty history. Following The Battle for Mewni, she will most likely replace Toffee. She currently serves as a supporting character and advice-giver to Star, and it is very ambiguous as to whether or not she is truly evil.
She was voiced by Esmé Bianco.
- You can try. You and I together, Ludo.
- —Eclipsa's last words before her death, as she and Ludo headed towards the star, in Cleaved.