FN-0606 was a stormtrooper within the First Order's FN Corps during 35 ABY; he was a male human. In an attempt to free Chewbacca, Rey came to the Star Destroyer called Steadfast, where she used a mind trick to confuse FN-0606 and another stormtrooper. She was a young Jedi at the time.
The 2019 movie Star Wars: Episode IX The Rise of Skywalker, the concluding chapter of the Star Wars sequel trilogy, marked the initial appearance of FN-0606. Dave Hearn, an actor who also performed in the J.J. Abrams-produced theatrical production The Play That Goes Wrong, portrayed him.