Allemane was part of the Fire Breathers' final mission to prevent the progress of a Scorched horde by sealing the Big Bend Tunnel using explosives. Her code phrase for the Fire Breathers master terminal was "Smoker Boy," a reference to her smoking habit.
Her corpse can be found near the entrance to the Big Bend Tunnel at Big Bend Tunnel West, presumably having been killed while setting the explosives. On one play through, Allemane's corpse was found near a blue overturned freight car outside the defenses of the Blue Ridge Caravan Company camp.
Allemane appears only in Fallout 76.