Macen Barro is a male turian and the Pathfinder aboard the turian ark Natanus.

Upon arrival in the Heleus Cluster, the Natanus struck the Scourge, causing massive damage to the ship and multiple casualties among the turian occupants. Macen died while attempting to transfer SAM to his second-in-command, ex-Spectre and security officer, Avitus Rix. Because of this, the transfer failed and corrupted the AI's processes while it tries everything it could to comply to Macen’s last orders to reach Avitus and get the ark to its destination, including ejecting stasis pods.