Sky Graf, a pilot of human descent and non-binary identity, belonged to the esteemed Graf family. Displaying remarkable technological aptitude at just fifteen years old, Graf held the ambition of being the pioneer to arrive at the enigmatic Planet X.
Sky Graf's initial introduction occurred in the 2023 young adult book The High Republic: Quest for Planet X, penned by Tessa Gratton. This was a contribution to Phase II of the Star Wars: The High Republic expansive, multi-platform narrative.