The cat considers this request, deems it sufficiently polite, and makes a graceful leap off the sign and saunters in through the cat-flap.

Presently, the entirety of the door opens, revealing a woman about the same age as the twins with brown hair a bit past her shoulders, curious brown eyes, and a slightly bewildering outfit. She has witch robes on, in traditional black - but they are worn open to reveal an outfit of blue leggings and a white tunic, and a wide variety of accessories, including seasonally inappropriate lace-up moccasins, a belt covered with pouches, and a necklace that features as its centerpiece a glass marble. "Hello there!" says this person. "Cricket says you're Sherlock and Tony; ought I be addressing you as Your Highnesses?"