Born on Palaven and a decorated engineer in Blackwatch, Macen Barro was touted by the Hierarchy to be a shining example of a turian citizen. There were concerns among Initiative leadership about whether or not he would leave his comfortable life behind to become the turian Pathfinder, but Macen was eager—so long as he could name his replacement: Avitus Rix, a former Spectre. Internal emails and screening interviews state Macen and Avitus met in the field and suggest that their relationship may be more than platonic.
Macen Barro left the Milky Way aboard the turian ark Natanus in 2185.
Despite his initial hesitation, Avitus Rix complied with Macen's last request to take up the role of turian Pathfinder. A grief counselor was assigned to Avitus upon his arrival at the Nexus, but he has yet to show at a session.