Lilith the Succubus

Lilith aka the Succubus is the antagonist of TV show Sleepy Hollow. She is a demon whose heart is stored away from its body. It is drawn to secret desires, and is able to mimic them.

Heartless
In "Heartless", Henry Parrish summoned Lilith, where she took the appearance of an attractive young lady, sucking the life force out of both male and female victims in public places.

Nick Hawley was almost killed by the Succubus, but was rescued by Abbie Mills and Ichabod Crane.

At the cemetery, Katrina Crane and Abbie recited the incantation to destroy the Succubus' heart, while Crane and Hawley tracked the Succubus at the club to destroy her body.

However, even though Ichabod and Abbie killed her, Lilith's work was already done, as she had absorbed enough life force to bring Moloch into the world -- as a seemingly innocent-looking human baby.

Triviarivia

 * She is portrayed by Caroline Ford.