F-247

He doesn't have a name, and he doesn't really mind being called as his ID number, so everyone calls him F-247 or Fourty-Seven for short (not like they care enough to give him a proper name anw).

He's from a post apocalypse world where humans have created and evolved into hybrid creatures of all kinds to adjust to the earth as it shifts into a more unstable state. He worked for an organisation called Penumbra (which in this case is the enterprise that develops and produces these kinds of mutated species). But an incident happened when one of his coworker didn't completely destroy a bacterium with mutated genome (this later turned out that it was planned). It broke out and wiped out 2/3 of the populations. The majority of the rest went in to hiding and currently unknown how many lived to this day. He's now cleaning up the mess by collecting specimens to help find a cure and finding his lost friends/coworkers while battling what's left of "mankind".