The Empress is a member of the Vampire King's court in the Adventure Time miniseries "Stakes".
The Empress was staked by Marceline Abadeer to protect the last remaining humans.
She returned after Princess Bubblegum drained Marceline's vampire essence. She heads towards the Ice Kingdom, where she apparently mesmerizes the Ice King and gets him to deliver Finn so she can attempt to feast on his human blood after she expressed dissatisfaction with penguin blood. After Ice King has captured Finn and later Marceline, the Empress orders him to kill the latter, only for him to refuse and start an argument with her. After Finn and Marceline have freed themselves, the former distracts the Empress, allowing the latter to use the Ice King's powers to trap her in ice. Before Marceline can stake the Empress, Ice King prevents her to do so by blocking her path, but ignores the Empress' demands, eliciting her to put him deeper under her spell. However, it is later revealed that Ice King is too "thick" to be mesmerized, and is only doing her bidding because she "is a woman". The Empress then upsets the Ice King by scolding him, leading Finn to console him. After the two leave, Marceline attacks the Empress, but is quickly overwhelmed by her. However, before the Empress can hypnotize her, she is immobilized by Bubblegum, allowing Marceline to stake her and suck her soul regaining her power of Invisibility.
- She is named after the third trump or Major Arcana card in traditional Tarot decks. The Empress card represents beauty, femininity, and abundance. Similarly, Empress is the most feminine vampire in the Vampire King's court and marveled for her beauty by Ice King. She has refined taste and high standards; rather than subsist on Penguins' blood, she demands "the top drawer stuff," AKA human blood. In the reversed position, the card can represent a dependence on others, which is in keeping with her primary power of hypnotizing individuals to do her bidding for her.
- Jake describes her as looking like "Black drapes on a cake pop"
- The shape and color of the gem in the middle of her headscarf is the same cut as the gem of Rose Quartz, from Steven Universe. The color is a deeper magenta.
- She is shown to be skilled at playing a glass harmonica in "Vamps About."
- The snake coiled around her neck is never shown to have been used for attacking opponents.
- Her skin color changes to light mint green into light gray when her head cloth is put off.