Xa Su was born on Cathar but shortly after adolesence his family moved to Kashyyyk or Wookiee Planet C as it was known at the time. His family befriended a small Wookiee family group who taught him to survive and hunt like them.
Just before Xa Su turned 18 the family was raided by slavers and he attempted to help fighting them off but ultimatly was captured and held by the Impreial Liason with the slavers. He was released the next day. From that day forth he swore to stop slavery whereever possible and went to raiding and hunting any slaver parties he could. His actions eventually got the notice of the Imperial Command there and put out a bounty on his head.
Xa Su managed to smuggle his way off Kashyyyk and found his way to Vagran where he found work with the Estainia Hunting Grounds as a guide and to help keep poachers of the preserve.
Four years later a vacationing Imperial Officer was visiting the grounds as had Xa Su as his guide. This officer was a member of the Inquisitorius and sensed that Xa Su was Force-Sensative. He attempted to restrain and take Xa off-world so he could be trained by the Inquisitorius. The brief struggle ended with Xa Su wounding the officer and again found a way to smuggle himself off-world.