Bak Rychuk, a human male pilot, was a member of the New Republic forces throughout the Galactic Civil War. As a Lieutenant, Rychuk was assigned to Shepherd Squadron, where he operated under the callsign Shepherd Two alongside his astromech droid, Zeetoo-Zeetoo. He piloted a BTL-A4 Y-wing assault starfighter/bomber and took part in both the assault on the Fondor Shipyards and the Battle of Jakku.