I've never really had one either. I guess that's going to change now...
[Mrs. O'Leary was technically Percy's hellhound, even if Nico dropped in on her sometimes. And Cerberus was more his father's pet, if he was a pet at all...
He followed Duo out of the apartment with Momo, letting the dragon loose as soon as they were clear of the complex. He watches her silently for a moment, then just kind of...]