Life on the streets involves a lot more transient 'appearances' at events and destinations, than staying outside, 'squatting' or working the traps (circuit of low end & abandoned housing, empty commercial buildings)- lacks freedom, control of self.
Territories. Homage. Duties.
Trying to stay at 'friend's places, hotels, sleeping in a vehicle, then camping are the primary order of habitation for most expelled 'housies' (people who have homes and do not grasp the lives of those outdoors, reject survivalism and lack of privacy).
Those who adjust to homelessness tend to seek a family unit, travel, camp, abandon modern concepts for older cultural ideals... curiously EG was connected to a certain semi-psychedelic underground there, not especially hiding or living a dual reality that I've found.
Those who are living at street level, primarily outside, are known social presences where they exist (public fixtures, if you will).
Find the service centers that provided options to such a person during such a time, and you will find an entire scope of characters who have the In on this one in particular.
Try churches, nonprofits, agencies that run 'drop in' youth shelters, watch for tribal gatherings if you want to find her social sphere and alliances.