The black cat was the Dark Lord's newest favorite. Although he still dearly loved his terrifying giant snake Nagini, Nagini's belongings were all things meant for humans, whereas this black cat was treated to the highest-grade feline supplies available.
This gave every little student at Hogwarts and all the Death Eaters a strange misconception: the Dark Lord had a daughter who was a snake, and a beloved pet named Sev.
Sev was the cat's name. Many Death Eaters cast bizarre glances toward their dark-faced Potions Master, but he wore no expression and offered no explanation.
Chapter 24