Eurydice is one of the 13 fairies that I made up once upon a time (ha ha, no pun intended...ish) when I was a composing a (as of yet and probably perpetually) unfinished story about Sleeping Beauty. There's one for every month, plus one extra. They have all sorts of alliances and suchlike and are at war, and elemental, and all have weird names that are vaguely associated with their month names, function, or holidays therein. Eurydice is the fairy of December. Her name ends in "-dice", similar to the "dece-" preceding December and marking it as the tenth month. She is the third oldest fairy and allied with Sanguine (October), and Mellie (November).