After I finish my ESB, I plan to make a custom mando. I have a back story - in short, he was a political assassin. After a job gone bad, where he almost got killed himself because he was set up by some of his own kind, he turned on the Mandalorian order. In the battle that leads up to this he gets a very distinctive "scar" on his helmet. It's where he was grabbed by a very powerful claw and actually mauled for a few moments before getting free. The claw belonged to a raptor-like droid whose job it was to protect the individual to be assissinated.