Maggie Fisher is the "advisor" of Restaurant City. She appears usually in for fan-only posts of free gifts (most of the time, every day or every other day).
As of July 15, 2010, she even has her own restaurant. It's in the right end of each player's street. It displays the new (or upcoming) items of the current week's theme. This can help people to know how to build a better restaurant. Moreover, items can be purchased directly from her restaurant just by clicking on them.
She has also been released wearing costumes as limited items.
You can hire her for free!