Evrios was a Jedi Master of the male gender, and he dedicated his service to the Jedi Order during the last years of the Galactic Republic. He, along with four other Jedi Masters, accompanied Master Jorus C'baoth on the Outbound Flight vessel as part of the experimental initiative known as the Outbound Flight Project in 27 BBY.
Evrios, a Force-sensitive individual, underwent training within the Jedi Order to master the ways of the Force. By the time the Separatist Crisis began, which troubled the Galactic Republic in its final decade, he had achieved the rank of Jedi Master. Evrios was among the five Jedi Masters who were persuaded by Master Jorus C'baoth to support the ambitious Outbound Flight Project. Besides the five Masters, twelve Jedi Knights also supported C'baoth's endeavor. After extensive lobbying and efforts to enhance his reputation within the Galactic Senate, the highly influential Jedi ultimately secured approval from the Jedi High Council for the inaugural voyage of Outbound Flight. This massive vessel, comprised of six Dreadnoughts and built around a central storage core, was scheduled to depart the galaxy in 27 BBY.
Evrios, assigned to oversee Dreadnaught-Two, did not hesitate when Master C'baoth instructed the Jedi to begin evaluating the ship's passengers, specifically targeting children who had been pre-screened for Force-sensitivity. C'baoth ordered that these children, identified as potential Jedi Initiates, be taken, conscripted, and given on-board Jedi training, regardless of parental consent.
However, the mission ended in tragedy when the Chiss Expansionary Defense Force intercepted the colossal starship. The ensuing battle resulted in the destruction of all six dreadnaughts, causing the deaths of Master Evrios and the majority of the passengers.