Names are very powerful when it comes to controlling demons and other things- or at least trying to control them...
Lili would soon learn the power of names.
Bart was Bart. He had been since the boy named her that when he had collected her from the litter basket, the day Bart was born. The boy might be a girl now- a girl demon at that. Bart might be a hell hound now, but he was still Bart. He would always be Bart.
The dog's ears pricked up. His new hellhound hearing picked up the sound of a distant train horn/whistle. It was the Bay Area Rapid Transit train in the underground of San Francisco. The sound carried better underground - least ways for demon hearing it did. Bart got all glassy-eyed. Like a sailor to a siren's call, Bart was drawn to that distant underground transit system.
As Lili watched, Bart was growing larger. More the size of a medium sized farm animal than a dog- perhaps a big sheep or small cow? His eyes were glowing red. Lili standing on tiptoe buried her face in giant Bart's cheek. He was now as tall as a Clydesdale.
Bart looked at Lili, as if to say, "I'll be back."
He let out a bay of a hell hound on the hunt. Flocks of birds took to the air for miles around. Grown meant shit themselves in terror, not sure why they should fear the distant howl of a dog- but deep down inside they knew, a part of them knew that a hell hound prowled tonight.
Dogs move fast, but demon dogs move faster. A black shadow flickered, and Bart was gone. Lili felt a hot wind in his wake. She turned to look at the kitchen door, or at least where the kitchen door had been. Smoke rose from the charred opening in the wall left in the hell hound's wake. A tear ran down Lili's cheek. It turned to steam almost at once. Demon's never cry.