[quote=WittyReference]
Sorry about that, an easy fix! I figured their pedigree was what got them residence in the Fort since the opening post was them using their medical tents though now that I know they're thieves as well, it makes much more sense they were Squatters :p
[/quote]

Ellie is the thief. And no they aren't squatting, Ellie is lending her medical skills to the Followers in exchange for being able to stay there.