I think she's a reminder that not all guards are a-holes.
The skinny black guard that moved Watson out of Miss Claudette's cubicle has always been professional.
The big (not the fat one) white guard that muscled Watson out of the electrical shop is usually quiet and respectful.
They aren't all after something they shouldn't have, like Pornstache, Bennett, Healy, Caputo, and that Assist Warden chick. (What IS her name???)