I think I am going to go with the concept of the gorgon urchin that I used when I created the gorgon archer using Unearthed Arcana warlock stuff. To reiterate, the idea is that there is a sort of ghetto where adventurers, soldiers, priests, or whoever dumps the young monsters that they feel are innocent and thus not responsible for the terrors of the adults. The public image is that this is a safe place where the monsters will be protected and raised properly. The truth is that the individuals within it are frequently abused and taken advantage of. They are also typically not allowed to leave the borders of their sanctuary with the idea that it is for their own protection as if seen beyond the walls it will be assumed that they are monsters.
I already ran the archer as an urchin, so I think I want to twist this a little bit here. I would do them as a Folk Hero, but that's more geared toward a rural background and this is an urban one. For this case, I'm going with a Criminal background of a smuggler variety. The idea being that they smuggle things in and out through the city.
For this I am using a 30 pt spread instead of an array.