"Waylon didn't mean to, but he killed his mother the day he was born. In fact, it happened before he took his first breath. His father left him, and the aunt who took care of him never set down her bottle, except to grab a new one. The scaled patches on his skin saw him treated as an animal by the rest of society, and it was no wonder he was beaten and arrested whenever he fought back. Eventually, the scales had fully covered him, and he found a job wrestling alligators at the circus. He hated this, of course, and when the day was done, he sat there for a few hours to fix the gators up. One day, when he was finally ready, he killed the cops who'd beat him, then went down to the city and took the underworld over. However, even this couldn't last. He was subjected to horrible tortures in the asylum, and continuously escaped, only to be recaptured. Confined to the streets, he walked around the sewers trying to find peace. This was when the straw broke the camel's back. Or in this case, arms.
The man called Bane defeating him was what drove him over the edge. He devolved into a cannibalistic monster. He mutated again and again each time he appeared. And then the moment he finally found peace in the sewers, Hush arrived.
His mind and body corrupted, he became an even deadlier monstrosity, confined to permanent misery. However, he overcame this. One day, he found a family, and on another, I came back to see my childhood friend again. We all stayed together peacefully in the countryside. And that's when the rains came."