Taken from mal:
Maya is an 18-year-old glasses-wearing girl who works at Wagnaria. She professes that she is a "normal person" striving to be completely ordinary in work and life in general. She has a hard time understanding the other employees seeing how awkward all of them are and tries not to be too familiar with them. The irony is that because she tries too hard to be "normal", she ends up being pretty weird herself.
out of nowhere for one whole ep of the second season they treat her like a regular character for no reason, pretty sure it was meant to be a joke to poke fun at fans who wondered who she is and stuff