The three ghosts call the Other Mother “Beldam”, which means “ugly, evil-looking old woman”. The word also resembles the term Grand Dame, the title given to important women in the Illuminati mind control system.

“An Illuminati Grande Dame will assist the programmers to insure that the proper script is given to the child and that a psychotic break doesn’t occur causing the victim to lose their mind.”
– Fritz Springmeier, The Illuminati Formula to Create a Mind Control Slave

Not so coincidentally, the Beldam in Coraline basically plays the role of a Grand Dame in mind control programming.

“A close loving bond is needed between a child and the initial abuser so that a clean split is created when the initial mind-splitting trauma is carried out. The clean split occurs when the child is confronted with two irreconcilable opposing viewpoints of someone who is important to them. The child can’t reconcile the two extremely opposite views of the same person, one being a loving caretaker, and the other being the worst kind of abuser. The person the child trusted the most is the person the child fears the most. Some professional therapists have come to realize that this is how the core is split.”
– Ibid.

In Monarch Mind Control, the Grand Dame is one of the three people that assist in the programming of young slaves. Like in Coraline, the Grand Dame is somewhat of a (twisted) mother figure.

“As a child of the Illuminati progressed through its programming, three people had oversight over its programming: its Grande Mother, its Grande Dame, and the Programmer.”
– Ibid.

Throughout the movie, Coraline is told that there is “only one key” that can open and lock the door to the alternate world – and the Beldam desperately wants it. This key represents access to Coraline’s psyche. Either Coraline has control of it or the Beldam does. For this reason, there is “only one key”.

In her quest for freedom, Coraline is not alone. She is helped by a strange character.