Morgana Ignis

Morgana Ignis is the voice actor for Millie's sister, Sallie May, as well as the Catfish Monster from "Spring Broken".

Career
Ignis is an American screen and stage actress, best known for playing dark, eccentric, and visually transformative characters in the Comedy, Science Fiction, Horror, and Fantasy genres. She is often noted for her tall, slender body-type and versatile physicality. Ignis was a regular guest star on the IFC series Stan Against Evil (2016) playing multiple featured demons, performed as Edgar the Werewolf in The curious creations of Christine McConnell (2018), puppeteers the alien talkshow host Ned in the Disney+ series, Earth to Ned (2020).

Trivia

 * In a tweet, Morgana stated that Sallie May, like her, is a transgender woman.