This is Ember (I do not yet have a civilian name for him yet. Any suggestions?) He was a college student when got his powers in some kind of scientific accident at a lab where he was an intern. He can fly, and can summon and manipulate fire. He is self-trained, and was recruited by the Warrior after the Warrior grew suspicious of him (the lab happened to provide materials to the Warrior.)
Ember is the most laid-back member of the All-Stars, and frequently quips to hide his insecurities and anxieties.