Jaromír Kovář (ME-1)

Not a Perfect Soldier
Leonid Kovar was a young, frail recruit in the Russian military; his physique, and powers were granted to him in a government experiment in an attempt to create super soldiers, but his powers were fueled by unstable radiation, which is liable to go berserk should he be put under stress; this caused Kover and the other test subjects to destroy Russian cities. With his countrymen turning against him, Kovar chose to exile himself, and began living in an abandoned SIberian power plant, where he would funnel his excess radiation into capsules whenever his energy would build up too much.

But A Good Man
Unfortunately, a leakage in the containment unit made the radiation seeped into a neraby pond and created a monster comprised of Kovar's excess energy, and his latent resentments; this creature went on to wreak havoc on nearby settlements. Because of the identical energy signature, Kovar was blamed for the monsters actions. with the help of the Teen Titans, most notably Green Lantern, Leonid overcame his fear of his own power, and destoryed the monster he created, nearly sacrificing himself in the process. The people that once shunned and feared him, now see him as the hero he always was.