Megan and Zacharias
The Jones family arrived all in a group and peeled away slowly, first the parents (who'd seen some fellow business owners they wanted to talk to), then Gwenog (surrounded by a group of Quidditch fans), then Lowri (to admire the architecture of the house). Before long it was just Megan and Hestia.
There wasn't a huge group of people there, but it was still enough that it took Megan a little while to see Zacharias, mainly because she was quieter than usual and not looking around much. In fact, it took a gentle nudge from Hestia and a murmured, "Isn't that your friend?" to get her to look up and see him, and step forward saying, "Hi, Zach..."