I have currently undertaken the task of overhauling my profile page. How you ask? By making it all Undertale-related! I don't care if it's just a phase; I've had this game for, like three days at the time of writing, and I've played through it almost four times, deriving incredible enjoyment out of each playthrough. It's such a wonderful game, and it easily joins my list of my favorite games of all time, a list inhabited only by two other games: Bastion and Transistor. Those who know me know I've clocked in, like, 3000 hours of Skyrim, but that doesn't mean it reaches the top spot; it's good fun, but it doesn't have a good story aside from the ones you make yourself. Bastion, Transistor, and now Undertale all have wonderfully written stories that I've fallen in love with, with brilliantly written characters that I can shamelessly hold up as examples of how to properly forge a good character in fiction. Undertale is such a dynamic game, and it's a fantastic experience that I enjoyed....
Nym is enigmatic, at best, with a back story very little people are aware of, even among his crew. The best theory most can come up with to explain what he has is that he once served some sort of faction as a black-ops or covert agent, but left for some reason.
Back story aside, Nym is known as a very competent fighter, and a good commander, carrying out effective raids on all sorts of targets, including trade shipments, prison barges, and even military convoys. Very little data has been gathered on him, but what has been gathered suggests he is extremely experienced, and very powerful.