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)
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.
Hanastrew
To be a worthy protégé of her heroine, Eileen. To run the fairy squad efficiently and for each member, including herself, to be brave and resourceful. Hanastrew sympathizes with Eileen’s view fairy government must be honourable and honest. While Hanastrew never understood Eileen’s defection, the young fairy did understand the older one’s anger at magical power abuses. Hanastrew would also like to eat as much chocolate as possible without putting on any weight but even a fairy godmother cannot arrange that. Certain laws, what goes in must go out (or on the hips) must always be obeyed!
Melanbury
To begin with, it was to have a proper marriage with L’Evallier. Now their union has been consummated, Melanbury has become more ambitious. Far from wanting to stay the doting, dutiful noble elf who seeks to please her family and follow the old ways (notably staying at home and producing baby elves), Melanbury has been active in Palace life, helping Eloise and Peter adjust to new life together after their tragedies. Now Melanbury is the Queen’s correspondence secretary and loving the role. L’Evallier does not approve, given he too is a disciple of the old ways, but he can see his wife is happy and that benefits him (at least when they’re both off duty!) so Melanbury is achieving a happy personal life and a career. Now she doesn’t want anyone wrecking this.