Bee

Bee was the main antagonist of the comedy horror film The Babysitter and the redeemed anti-hero of The Babysitter: Killer Queen. She was the babysitter of Cole and Phoebe and a secret Satanist who made a deal with the devil in exchange for saving Phoebe's life. After being defeated by Cole, she disappears and emerges two years later where she orchestrates a series of events that lead to the demise of The Cult and the freedom of Cole and Phoebe.

Appearences

 * The Babysitter
 * The Babysitter: Killer Queen

Personality
Bee appears to others as a charming, lovely, character who is loved by Cole and is very protective of him. She tends to his injuries, gives him helpful advice, and has fun times with him while babysitting him. However, deep down she is a support of Satan and offers sacrifices up to him in exchange for making a deal with him to save Phoebe's life.

Bee appears to be deranged to her friends which was originally her personality before she was swayed by Cole when he professes his love for her. After Cole does this, Bee's personality changes and instead she tries to help Cole and rises two years later to save him from the cult who have risen from limbo.

Early Life
Not much is known about Bee's early life but at some point she became the babysitter for Phoebe and she seemed to care deeply for her. When Phoebe accidentally leaves her toy rabbit at the park Bee drives her to retrieve it but along the way collide with the car of Phoebe's parents, sending them off a cliff and killing the parents.

In the hospital, Bee believes she is the only survivor and asks the nurse whether Phoebe is okay. The nurse tells her that it's not looking good and then asks what she'd do to save Phoebe, revealing her true identity as a satanist. Bee claims she'll do anything to save Phoebe's life and makes a deal with the devil which results in Phoebe's survival, a survival that is declared a miracle.

Sometime after this, Bee joins a Satanist cult and claims ownership of The Devil's Bible. Part of her deal with the Devil is to get others to join the cult by having them sign their name in the bible. Along the years, Bee tracked down Max, John, Allison, and Sonya and convinces them to join the cult with the promise of completing a ritual that'll give them their greatest desire.

Sometime after this, Bee becomes the babysitter of Cole and arranges with her friends to steal his blood that they'll mix with the blood of a sacrifice which can then be consumed to complete the ritual.

The Babysitter
When Cole is attacked by bullies, Bee steps in and threatens them and then drives Cole home. The next day, she arrives at Cole's house where she'll be watching him for the night and they have fun swimming, gaming, and reenacting movie scenes. Bee offers him an alcoholic drink, which has been spiked with sleeping medication, but Cole pours it into a pot plant but acts as though he drank it.

With Cole asleep, Bee invites her friends, as well as another guy, Samuel, and they play truth or dare where Bee is dared to kiss all of her friends. When she gets to Samuel, she pulls out two daggers and kills him and then her friends fill two chalices with blood which act as the blood of the sacrificed. They go upstairs to get Cole's blood however he has already called the police. Cole pretends to sleep as Bee enters and they draw his blood. Convinced that Cole is actually awake, Bee hides in his room and confronts him when he gets out of bed.

When Cole passes out from the blood loss, Bee and her friends tie him up in the living room. When Cole wakes up, the police arrive but are subsequently killed by the cult. A chase ensures and Cole is able to kill the members of the cult and return to the house where he is attacked by Allison who is killed by Bee with the cop's shotgun. Cole runs across the street to his friend Melanie's house and they evade Bee as she searches the house for him.

Cole lures Bee back to his house and she explains her motive for joining the cult, claiming that she made a deal with the devil to get whatever she wanted. Cole threatens to burn the bible and she tries to coerce him into joining the cult and blaming the night's events of the other members of the cult. Cole refuses and burns the book. As Bee tries to save it, Cole steals Melanie's fathers car and crashes it into the house, seemingly killing Bee. He professes his love for her and she appears to die.

When a firefighter arrives to the house he searches under the car and we see that Bee's body is gone. Bee appears behind him and presumably kills him.

The Babysitter: Killer Queen
Although not having direct involvement with the events of this film, Bee had a change of heart when Cole admitted he loved her and she decided to save him from the cult, knowing that they'd rise two years later and come after him. She coerces Melanie to join the cult and she takes on Bee's role. Melanie lures Cole to the lake and Bee sabotages Phoebe's jet ski so that she and Cole cross paths with each other.

When Melanie reveals she's part of the cult, Cole and Phoebe are able to evade them and make their way to Phoebe's old house where she has the key to after Bee leaves it in her locker at school so that she would go to the lake. Melanie kidnaps Phoebe and holds her hostage, knowing that Cole will come for her.

When the ritual begins, Bee emerges from the lake revealing she has been alive the whole time. Melanie takes Cole's blood and she and the rest of the cult, minus Bee, drink the blood but it is now tainted as Cole and Phoebe had sex and as a result the cult dies from drinking tainted blood.

Bee reveals she planned all of this and left the key to Phoebe's house in her locker so Cole and Phoebe would cross paths at the lake and hopefully have sex so that Cole wasn't innocent, knowing that once the cult drank the tainted blood they would die and it would be over. Bee then reveals that it's not over until she is dead as there is no win or loss with the "devil shit" and thus she says her goodbyes to Cole and Phoebe and drinks the tainted blood and dies, leaving behind her Devil's Bible.

Trivia

 * The make-out scene between Bee and Allison was not scripted.
 * All of the advice Bee gives to Cole eventually leads to her and the cult's demise.
 * Bee has always been a good person and only turned to the dark side when she made a deal with the devil to save Phoebe's life.
 * Samara Weaving's involvement with Killer Queen was left a secret and it was initially believed by fans that she wouldn't appear in the movie.