Chocoholic, like the entire Cryonic Hive. A minor inconvenience, compared to sucking the small Frozen North communities dry of love.

Then again, there's all of Equestria, and the rest of the world, that could be ripe for an invasion… but the politics and logistics involved, dear lord! Yes, Queen Nymphea is kinda lazy. Or simply less ambitious than the other queens. Or smarter.

She did become Prime Minister of the Frozen North by playing the game by the rules. And then secured cocoa production and importation into a country where chocolate was a priceless luxury few could afford. So my bet is on her wits.