Max.
Edit: Max is from the housing association that owns the building I live in and has demonstrated an almost alarming ability (following a phone conversation in which I started babbling hysterically) to immediately turn up and stop my neighbours from playing the Mama Mia DVD so loudly that it could be heard three floors down over and over on repeat all day every day. I can't imagine what she did, as they seemed not to care about eviction and willing to go the distance through the courts rather than stop. Does she actually have magical powers or was it like the Godfather? I don't know.
I've never met her, but I have never been so grateful to anybody ever.