"When you become an animagus, you don't get to pick what animal. It's the animal that fits you best, you know? So, maybe a dog or a cat. Or it can be anything, really." Sirius waved his wand, just showing a load of different animals, rapidly changing from one to the other. He wanted to give the boy a visual spectacle. "But, yes. In our story, the werewolf was so happy. From then on, every full moon, instead of being alone and in pain, he got to play with his friends! They explored everywhere and it was the happiest time of their lives."

Sirius kissed the top of Harry's head, then whispered. "Do you want to know a secret?"