Vampire's Pet
I've learned not to speak unless spoken to by the Pet Master.
I squeezed my eyes shut, ready for him to hit me or yank on the leash or something, but he didn't.
He did, however, take my wrist in his hand and lead me into the back area of a limo.
Most of the vampires traveled like this, the ones in this city did at least.
It was more of a formality than anything. Vampires could easily get to any location they needed with their advanced speed, but I guess some preferred this.
Only specific slaves were chosen to drive them.