I can't say that I'm pleased that she's learning the Dark Arts, and would be very happy if she could stop, but we will all do what we must.
I accompanied Cassandra. She's friends with the Yaxley girl and didn't want to go alone. While avoiding him is high on my list of to-do things, I felt that an escort might prove advantageous to her health. Besides, the polite insults thrown his way were entertaining, although I'm not sure he understood them.
I wouldn't know the great-grandparents, but the description fits this Goyle pretty well. I'm sure I'll enjoy making fun of them.
I'll let you know if I find out anything more, but yes, I'm sad and dejected that he's not feeling well.