It's tricky to give Tom facial expressions, or expressiveness in general, when most of zir face is covered. I hope it's clear that ze's crying on this page. (Of course, you also have Dumbledore's narration to give you a sense of what's going on, but Dumbledore is not necessarily a reliable source.)
I was once in a play where the actors wore masks, and the director gave us lots of good tips about how to be expressive without using a face. I think that experience has helped me in writing Voldemort's Children.