The tree in the alley was waiting. Waiting, and thinking how to escape the ugly alien city. And then another lost, hurt, and lonely soul wandered by. Note: While this story takes place on Hala, the Kree home world, this should not be taken as an indication that Rocket was made by the Kree. (Maybe he was, maybe he wasn't). How he ended up on Hala in prison garb is another

When you're building a monster, even a little one, you'd be well advised to treat it with compassion. If you don't, if you make its life a living hell, then god help you when it gets loose.