Bo

"'So what's with the freaky lizard thing?' (Presidential)"Ouroboros, shortened "Bo", is Avatar Xavier's animal companion. She is an Extremis-enhanced gliding dragon, found by SI while storming an AIM facility.

History
Bo was cloned in an AIM lab, and never knew anyone else of her own species. She was subjected to many tests, even compared to the other subjects. Eventually she was injected with the Extremus formula.

After the initial post-transformation terror, she started to learn her new abilities, testing her limits and practicing control. She managed to escape into the woods surrounding the facility, and subsisted for two weeks on the local insects.

When she heard explosions and gunfire coming from the lab, she hid in a bush, only to nearly be eaten by one of the Extremis-enhanced wolves that had been freed in the commotion.

But she was saved, by a person. She identified this person as different from the scientists, as the scientists would have never helped her complete a test. She befriended this new person, and went home with her. Over the following weeks, she met many more people who seemed similarly caring. She would warn her person of things she perceived as threats, and do her best to keep her happy.

Abilties
Regeneration

Bo's capacity for healing injuries was vastly improved by Extremis, to the extent that she can grow whole limbs back in mere seconds.

Camouflage

Her natural camouflage was also enhanced, such that now she can match patterns of things instead of just color.

Heat & fire generation

As an Extremis enhancile, Bo can generate intense heat from her body. She can also breath fire in concentrated jets for a short time.

Gliding

Bo's species have membranes on their limbs that they can use to glide from place to place, of equal or lower altitude.

Appearances
Bo

The Master Falls

Xavier Bronze and the Father of Jane Foster

Meet Bruce Wayne

The Other Guy

Presidential

Arrival: A New Year

Manhunt

Team Prime

See Also:
Mula, on Avatar Wiki

Fang, on Avatar Wiki

Appa, on Avatar Wiki

Momo, on Avatar Wiki

Naga, on Avatar Wiki

Draco dussumieri, on Wikipedia