Mildred is a lab rat, of sorts. No spells or tests were forced upon her, but a lifetime of eating arcane ingredients and students’ forgotten experiments will do strange things to a little rat.

At one hundred and eleven years of age, she’s a staple of the school. With so many students to learn from, Mildred has learned to read, write and speak multiple languages, and now helps write the student newsletter. And although she cannot work magic herself, she can still help students with her apparently endless knowledge, in exchange for a corner of sandwich or a nibble of cake.

Despite the best efforts of uncountable students and staff members, no one has learned where she gets her tiny clothes from.