All I know.

Protect, serve and survive

In 1998. 12 girls and 12 boys they were all kidnapped at 1 years old.
The couple who kidnapped them were the founders of M. B. C

the Magical Bodygaurd Children.

From the age of 5 these 24 children were trained to do nothing else but to protect a subject In need.. Even if it meant letting someone else die.

Every 10 years "Mom" and "Dad" kidnaps another 24 children.

Evie, is now 14. And she have been summoned for her first solo subject.