Revenge. In her earlier years, she relished her friendship with Eileen but Queen Gwendolyn’s admittedly bad treatment of the Witch and her abandoned father, fuelling the Witch’s resentment and hatred of fairy royals, overcome that affection. The Witch really wanted to hit back at those who caused her hurt. Sadly, she took the view that if the innocent got in the way, too bad.
Brankaresh (Chief Wizard)
Power (especially magical gifts), riches and all that come with these things. Ideally a totally subservient Fairy Queen so his other fantasies get fulfilled as well! He has very little chance of achieving the latter unless he can use significant force, as he knows, and for that he needs more magical powers. The best source for that is of course the Queen! So he plays the game, pretending to be her devoted servant when he would far rather she was his devoted servant.
L’Evallier (Chief Elf)
Stability in government. Like the Queen, a stable government and an end to external threats to it. Unlike the Queen, he longs for truly honourable behaviour from his monarch (she of course believes she already does this). He particularly wishes the Queen would not try to force Eileen and Jennifer into the Fairy Kingdom and frets about the consequences given neither lady is likely to take this well. Indeed when Jennifer is abducted, she does not! On a minor note, he hates contractions and would love to see them abolished.