"Oh no, you've really got to come with me! I'll explain on the way," Aggie says. In a hurry, she withdraws the invitation from the little purse she has, highlighting Ron and Hermione's names in elegant gold script. "I'm going to his wedding!"

She doesn't realize how young she looks, but Aggie holds out her hand. "This city it's...People call it a pocket world. Or other names, but they're usually really rude and people frown when I repeat them because they think thirteen-year-olds don't have ear."