Xavier Rykiel was a highly dangerous shadow operative for the Gamma Trita Corporation (GTC), whose combat skills are considered to be on par with the legendary assassin Mia Semm. He was a Ventran, with a rare and fabled power that allowed him to physically manipulate objects with his mind.

He tormented the Sol system aboard his ship Eidolon. On the planet Elyssia, just as he was about to execute Lorelei Ogden, April Vasquez killed him with a single shot to the head from her sniper rifle, permanently ending his threat.