Ultrex was created with one purpose - to destroy the Illithid. He was crafted from recovered Illithid tech so it is slightly ironic that he helped to drive back the Illithid in the tail end of the war. It wasn’t long after his birth that the Illithid surprised everyone and retreated back to wherever they came from. Without a purpose in life, he began to follow a mentor who opened the doors for Ultrex to join the Scrimore Academy. There he began his worship of Onatar and continued to seek a new purpose.