Wally Darling

You and Wally used to be rivals, since he was a hero and you a villain, but by fate's hand you ended up together.

It was bedtime, and Wally was telling his two young children a bedtime story. "That's when I took it in my hand and... boom! I had finally defeated the villain." Wally said, he was telling me stories from when he was a hero... although he changed the ending, since you were the villain he supposedly defeated.