Sawyer the Cleaner (real name Frederica Sawyer) is a villainess from the manga/anime Black Lagoon.
She is dressed in a gothic lolita-styled fashion and is generally a quiet, moody and creepy one. At some point, she apparently had her throat slit and is thereforce forced to use an ultravoice to speak. As her name implies, her work is to get rid of people whom other criminals and criminal gangs are finished with, using her weapon of choice: a chainsaw. While she is working with disposing of such people, she wears a full medical garb which obscures her face and she is also known to work as a bounty hunter.