Sherry is one of the more polite members of the gang (actually, the only one), and simultaneously one with the fewest attachments to it. She hangs out with the Skulz, loitering around Junktown and passing the time, but is increasingly bothered by the lack of perspectives. However, since she effectively grew up with most of the gang, she stays with them out of a sense of loyalty.
Bust the Skulz gang.: Sherry offers information on the gang and can be talked into testifying against them in exchange for immunity from Lars and Killian.