wanna do a medieval theme with a faerie twist thrown in?

Set in medieval times with all the appropriate attributes.

The twist is that some people have faerie guardians that live inside of them and come out when that person wishes it. Give them a special abilities: flying, magical attack, and magical defense based on an element. The faeries reflect the person they are the guardian of.

Since it is in medieval times, those with faerie guardians must keep this a secret or they would be thought of as evil. The church is a strong influence. You have your court, nobility, knights, bandits, villages, peasants.

What do you think? Want to do something along those lines? I'm not much into romantic pairings. It would be two characters who are not interested sexually in each other. Instead they would be united in a common cause or goal. The goal should help keep the story focused.