Fewash Welko, a Selkath individual, held membership within the Order of Shasa. Just prior to the Battle of Endor, he stood among the Shasan adepts who encountered a Human Jedi clad in dark attire, subsequently being persuaded to rebel against the Imperial troops stationed in Ahto City. Welko was part of the two hundred Shasans who participated in the dark side-driven slaughter, and following this event, the "Jedi" informed him that their allegiance now lay with the same superior.
He later authored the literary work titled The Battle of Ahto: A Memoir.