OOC:
Egbert will be there and will try to bring his friends along. He's wearing a fancy coat which he claims is made from the fur of 80 wolves. If there are snacks, he will be eating all the snacks. He's friendly and definitely up for meeting new people.
Arcturus is curious enough about the invitation to fly over - under a spell that makes him look older than he is, because he thinks your muggly laws about beer are nonsensical, muggles. There's no risk of trouble, however, because on arrival he decides that this place is very much not for him and stays outside. If he sees someone he knows before he flies off again, he'll reveal who he is. Anyone else who tries to interact with him gets Arcturus pretending to be thirty. ;)