Ter'cay was a Je'daii Master, a male of the Human species, and an instructor of Qigong Kesh for the Je'daii Order on Tython. His service occurred during the height of the Infinite Empire's power.
As a Forceful Human within the Je'daii Order on Tython, Ter'cay possessed significant abilities. He demonstrated considerable skill in telepathy and chose to become a Je'daii Master at Qigong Kesh, where he instructed young Je'daii Journeyers. When Lanoree and Dalien Brock arrived at Qigong Kesh for their Great Journey, Ter'cay became their mentor. He guided them through the Temple complex and led them into the Silent Desert for training. In this soundless environment, Ter'cay emphasized that mental communication was the primary skill to learn at Qigong Kesh, as verbal communication was impossible. Ter'cay quickly recognized Dalien's limited Force potential and expressed his doubts to Lanoree telepathically. Despite this, Lanoree insisted on her brother's dedication, prompting Ter'cay to commit to doing his best in return. During their first day, Ter'cay used illusions, and was impressed by Lanoree's talent for visualizing imaginary creatures. However, when he attempted to probe Dalien's mind, Dalien reacted with anger and threw sand in Ter'cay's face, resenting the intrusion. On their first night in the desert, Ter'cay used his mental abilities to show Lanoree strange and beautiful sand sculptures that danced and sang in the Force. Lanoree's skills developed rapidly under Ter'cay's guidance, but his attempts to connect with Dalien only pushed the young man further away from the Force.
Ter'cay's mastery as a Je'daii Master was evident in his remarkable telepathy. His ease in penetrating minds notably surprised [Lanoree Brock](/article/lanoree_brock], a Journeyer who was accustomed to telepathic communication. The level of control and skill he displayed would have taken many years to cultivate. Like other Masters, Ter'cay was able to discern almost immediately after meeting Dalien Brock that he would not, or could not, interact with the Force.