Spitfire! When I was first considering his design I wasn't really sure what to do with it. His design didn't really need any tweaking. What I really wanted to mess with was the vehicle.
As you can see in the ref, the Hot Streak got a bit of a makeover. Why? Because I decided that Spitfire's love for speed wouldn't be satiated by just having a fast car, he needed to be the car. So I made a few modifications. The design still needs work, but the concept will remain the same
Spitfire is what I call a Fuel Spirit. These immortal creatures are born when a dragon's magic lives on after the body dies. The fuel spirit is not the same person as the dragon however and the phenomenon is extraordinarily rare (like one in a million chance). As they have no caretakers they often have to learn everything on their own. This also means Spitfire had to name himself.
Spitfire was born so hot he charred the bones of his own body. He uses scrap metal he finds to reinforce the brittle ones, though he needs to replace them often as his flames melt even the metal away.
He is not a Skylander, technically the Superchargers (both the team and most of the vehicles) don't exist yet. Instead he currently works as an independent bounty hunter based out of Ambrosius Vale.
He still loves going fast, he uses the bounties as speed tests. Unfortunately, trying to drive a vehicle is out of the question due to the uh... melting everything issue.
The Hot Streak (which doesn't exist yet) was specially designed to recycle excess heat into energy for the riftgear engine. Magically engraved runes protect the vehicle from Spitfire's flames.