[@potatochipgolem].

The Jedi Order and the Sith Empire alike are experts at seeking out Force Sensitives in this era. The chances of someone not being detected by either faction, especially on a central planet like Coruscant, are slim. The horrors on Coruscant aren't really more special than other horrors in the galaxy at this time. Unless (s)he got to Coruscant from some obscure place far from the war and Jedi/Sith attention, (s)he would not likely have escaped notice. At least not if of the level of sensitivity that would make him/her eligible for eventual knighthood.

But it is possible that your character is a recently discovered Force Sensitive if the above is taken into account. There is no requirement that you've been training as a Jedi or Sith for a long time, though that may be advantageous in the long run. If you go with this path, you must have a pretty clear idea in mind for alignment in relation to Empire/republic, as the conflict explored in Aftermath is just as much that as it is Jedi/Sith.