This is a stellar chapter! The Harry section is spot on for how I think a first meeting with Dudley would go, especially since Harry's going to Dudley's turf rather than the other way round. I had to smile when Ron and George came to Harry's "rescue" and ended up being jealous of Dudley's mate when the subject just happened to be Angelina!
You did a spectacular job imagining what went on in the Quidditch trials. I felt as if I were experiencing them along with Ginny. I'm glad she made a friend and hope both girls get contracts from the Harpies. Well done.