Oo! I like this one very much! Great descriptions and great characterization on Riddle. If I were to offer a constructive critisism, it would be a small one. Some of your narration is a little awkward. I caught a couple of fragments that interupted the flow, and one non-narrator-ish thing (which potter knew by name, incidentally) that sort of broke the spell slightly for me.
But again I enjoyed the alternate POV a great deal!
Phoenix Song