I had this idea for a House Elf, in this case an Elf (or a member of some other Race) who is tied to a building or an organization (in this case White Rose) through a magical Household Pact. 

According to the Pact, in exchange for an offering, the Household Guardian performs tasks for the order (such as mending clothes, cleaning and taking care of the horses). The Pact also grants the Guardian magical powers to aid in performing the given tasks, such as speed and invisibility.

A rather unorthodox idea, I admit, but I thought it would be a nice twist to the Household Spirit archetype.

But, what do you think?