The Stig
Ambition - How do you even know?
He seems to want to stand around and watch. - Desire
No one really knows anything about the Stig, other than that they are fiercely loyal to Deacon Stone, and that they are a exceedingly capable Kindred. The Stig was first encountered during the opening of Savage Garden, when they showed up and started standing around. For their own purposes, the Stig takes it upon themself to carry out whatever Deacon desires.
No one other than Deacon (and possibly Colette, given her apparent discomfort in the Stig's presence) has seen the Stig without a helmet or full-body covering. And no one knows if the Stig is even capable of speech, as they simply do not talk.
The Stig does not speak, but seems to understand a multitude of languages.

Demesne
No one knows where the Stig hangs his helmet, only that he disappears before sun-up and he keeps a number of motorcycles, cars, trucks, and vans parked in storage units and garages all over the city.
Allies
The Stig concerns himself exclusively with the Lonely Ones and their allies, and seems to have no connections of his own other than to the mechanics at Transfender and Firestone.
Enemies
Though the Stig seems to harbor no ill will toward anyone, his association with Deacon Stone puts him at odds with Bear and the Outlaws, and his thin-blood makes him a pariah in Camarilla circles.
Secrets
The Stig is actually the Nosferatu known as Speaker, tasked with keeping tabs on the thin-bloods; but he genuinely likes them. He has become quite selective about his allegiances.