Fallout 76 Allies

Overview
Allies were first introduced in the Wastelanders update, as humans returned to Appalachia. Instead of the usual companion system seen in other Fallout games, allies act as "roommates" at the player character's C.A.M.P., and are tied to unique settlement objects. The player character can only have one ally in their C.A.M.P. at a time; this extends to their C.A.M.P. storage as well. If one wishes to change their current ally, they must scrap the present settlement object and build a new one for the different ally. Ally settlement objects are located under their own tab in the build menu ("Ally") and cannot be stored.

Two allies offer unique questlines and an overarching story, at the end of which they can be romanced if one decides to pursue that option. The other three allies only offer radiant quests.

Temporary companions
Unlike the main ally system, and similar to other Fallout games, many characters may temporarily follow the Resident during a quest. They will only be available during their associated quest, and will not follow the player character otherwise, nor can they be recruited to live at a C.A.M.P.