Jesse

Jesse was the main antagonist of The My Babysitter's A Vampire Movie. He is the ex-boyfriend of Sarah and the one who turned her into a vampire.

Background
In 1809, Jesse was known as Reverend Horace Black, the founder of the town of Black Church, which would later be renamed Whitechapel, and leader to a vampire cult of 219 followers. Eventually, the human townspeople attacked the cult and killed them by burning them to death. Somehow, Horace escaped this fate, and swore he would get his revenge on the humans. He also apparently knew Ethan's great-great grandfather.

Movie
He is a handsome and suave but sinister vampire whose charming smile hides a centuries-old secret. Not one to leave his fangs idle for long, Jesse has ambitious plans that he is determined to see succeed. With his considerable powers of persuasion, he hopes, one day, to control not only all of Whitechapel, but the spirited Sarah as well.

Season One
In the first season finale Re-Vamped, Jesse returns from the dead (courtesy of Ethan and Benny digging up the Cubile Animus, the nest of souls Jesse originally set his sights on) to propose to Sarah, telling her to travel the world with him and make her a full vampire. He attempts to do this by controlling Erica as well as biting Ethan so Sarah will save him, thus becoming a full vampire.

Sarah
Jesse dated Sarah until he bit her.

Erica
Jesse dated Erica after she was turned. They kissed in the movie.