Harry Potter
Harry didn't really mind dressing up a little, but he hated neck ties. Besides, he didn't want to be inadvertently disrespectful. He put on a suit for the occasion, and when he saw that everyone else looked quite nice, he was content to blend in. The castle was impressive, and did make him feel quite nostalgic for Hogwarts. He reckoned everyone would be there, so he went looking for his parents, Ginny, or his kids. He was starting to enjoy having his own little family. It was a big crowd, though, and the room was bigger than he'd expected it to be.
((I still have electricity for the moment. Hopefully it'll last a few more hours!))