I can't speak for things on your world, but they most definitely exist on the one I came from. They call us and support us with their magic so that we may fight for them in a war.

[Though Diarmuid knows now just how much of a farce that war was. Thinking of it brings a bitter look to his face.]

In that war your fiance, Kayneth Archibald El-Melloi, was my master. His fiancee, a version of you, was the one who gave me the magical energy needed to remain in the world. It was a bit of an unorthodox arrangement, but it allowed him to have a servant and still be able to use his magic at full during the battle instead of having it limited because he was supplying energy to me.

[Not that it had helped them when all was said and done, but...]