I'm thinking of a character who has no magical affinities. He's an average university student from a poor family, and he has moved away from them to attend a school in the city. He found a cheap house a bit outside of town, and it is surprisingly spacious for its price, with the only downside being the travel distance to the city. The house turns out to be haunted/possessed of demons. He leaves it, tries to call the police, but they can't help him.

Then the detective company from here could have picked up on the call (Maybe you listen in on 911 calls, for situations like this?) and you guys arrive to help him out. Battle happens, his house is wrecked, and he has nowhere to live, so he tags along with you guys.

If he has to have a special ability, he'd have to have been unaware of it his whole life. I'm thinking an affinity with angels (a guardian angel) and holy powers (mainly healing).

Can we work something like this into the story? Maybe set it up as a short side-quest for you guys once everyone gets settled in. Or a major event (i.e. turns out his house has a gateway to hell/eather/wherever being set up by dark beings).

If not, I'll work on something else.