I've been wondering that too actually. I mean I think that Cas might know of Bruce and vise versa considering that they go to a lot of parties. But I don't know about Miles. I mean to me he seems like someone who wouldn't normally leave the house. He's too irresponsible to be let out of the house. He could get lost.
Trinity wouldn't know anyone either, haha. xP She would like to walk around outside so the voices aren't too loud so she might recognize their faces, but that's about it.
What my original thoughts were was that no one knew eachother but I can see some of the girls/guys knowing others from the other house. But my characters don't know anyone outside of their house. They do recognize faces though
Edit: I just realized I forgot to post for Aiden ;-; that will be up soon