8-11 : Early Life
Kobra was the epitome of easy living as a child, he never had anything to worry about. His village didn't get destroyed, his parents didn't get murdered, and he didn't have some horrible demon living inside him. He entered the Academy at Age 9 and was an all around A+ student, he wasn't a prodigy but a hard worker.
12 - 16 : Venom
After graduating from the Academy, Kobra found himself at a stopping point in his life. He wanted strength, he wanted excitement. His entire life was too easy and too mundane. So, he did the only logical thing left to do.