Emily

Emily is the the Alpha Vampire's "special girl"

Early Life
Emily was abducted by vampires 12 years ago and kept by the Alpha Vampire as a "special girl", meaning she was one of his virgins that he fed on as a delicacy.

Season 7
Sam, Dean, and Bobby's ghost find Emily at the vampire's lair in a secret room behind a wall. Sam says he'll take her back to her mom, whom she apperently doesn’t remember. Emily tells them the dead vampires in the next room once brought back three humans who gave up rather easily. But, when the vampires fed on them, they died. One vampire didn’t feed and went hunting for animals.

Emily says that she knows of a retreat that the Alpha Vampire keeps and takes the Winchesters there. They decide to keep her in a motel room to keep her safe, but as sson as they leave to get the Alpha Vamp's blood, she calls him and alerts him that the brothers are on their way. Later, she tries to defend the Alpha from Sam and Dean, and he comes to her defense. In the end, he still gives them his blood to use for the leviathan weapon. ("There Will Be Blood")

Appearances

 * Season 7
 * There Will Be Blood