As far as I know I've always been like this. An amalgam of threads dancing about this earth like some aetherial being piloting a twisted puppet of his own creation. This isn't to say I haven't found use for my unique body, on the contrary, I have found a myriad of uses for it, some more useful than others. While the small minded man may think it convenient to be able to stretch forth a thread as if it were a hand much farther than their own wingspan, one of higher intellect may realize how useful it truly is to be made of string. Strings can be used for many things, sewing fabric, mending wounds and many such things, now imagine if you could make yourself into string to mend yourself, or possibly even to sneak into places you shouldn't be? You'd find it unbelievable how many people will just brush a piece of thread off of their shirt and not give it a second thought, never turning back to realize the group of threads forming into the shape of a human behind them. Man underestimates strings and threads, the tensile strength of one thread may be laughable, but a threefold cord is hard to break.
If you wish to know, my work as an assassin frequently keeps me busy. When I say assassin, I don't mean any type of underground thug as many would believe, but a highly trained government agent, tasked with the destruction of any form of terror that may set foot within my sights. Don't think me to be a somber fool who only wishes to get his check, don't think me some freak who gets his pleasure causing others pain either. I am a tool for the safety of the people, and that is that. I may not be the most pleasant person I've been told, acting in a similar way to how I kill people, when I let them hang limp from the ceiling it gets the message across for my personality. If you cross me you'll become just like them. Just like me. A bit… high-strung.