I must say that I like the way you write your OC's. I like this Healer Galen fellow.
I also loved the whole scene where Hermione's parents are trying to get into Hogwarts. Very unique and full of raw emotion.
Oh and btw.. i forgot to say this earlier... The letter that Hermione wrote to her parents last chapter was brilliant. So simple but heart wrenching.
Overall one of your better chapters.
Chapter Eight: The Grangers come to Hogwarts