If you think a person is a manipulator, does he/she know that they're a manipulator?

There's something about a co-worker of mine that I feel is a manipulator. She can hype things up so good to make you either do things as she see it or make you think she knows it all. Management is so convinced at her "knowledge" that when things tend to not fall into ordinance like she puts it, they realize that her input is not reliable. Do you think she knows she's a manipulator? Also, what makes a person a manipulator?