Kashan Santhe belonged to the Santhe family, the group which held dominion over the Santhe Corporation along with its associated companies, namely Santhe/Sienar Technologies and Santhe Security. He was the offspring of Phillip Santhe and the grandchild of Lady Valles Santhe. Similar to his father, his profession was that of an Engineer.
From his time as a student, Kashan harbored sympathies for the Rebel cause and served as a covert operative for the Rebel Alliance. He attended institutions of learning in the Core Worlds and during this time cultivated friendships with numerous members of the aristocracy whose allegiance to the Empire was suspect. Though he operated under the assumption that his grandmother was ignorant of his links to the Rebellion, she was in fact aware, and a significant portion of the intelligence Kashan provided to the Alliance originated from Lady Santhe herself.
He possessed a striking appearance, characterized by a slender physique and dark-colored hair. He was known for his impetuous nature, often biting off more than he could chew. His feelings towards his grandmother were a mixture of affection and trepidation. His father, Philip Santhe, remained in the dark regarding his son's ties to the rebellion.