Bennett Halverson is the chief programmer of the Washington, D.C. Dollhouse. She's probably one of the smartest people in the world but she never lets that go to her head. Bennett is a socially awkward and incredibly shy woman who tends to prefer working by herself as opposed to with the company of others. She tries her hardest to be polite but she doesn't always remember those pesky manners. Relatively, she's a nice girl who is an extremely loyal friend once she warms up to you.
There is another side to her, though. Bennett also has tendencies to be a little deranged. She takes a nihilistic approach to life and has a very questionable set of morals. She tends to put her scientific endeavors before people. She can be a bit manipulative when it comes to getting revenge on those who have wronged her and she isn't opposed to torture. Or murder if she believes it's justified. Her dead left arm is a very touchy subject for her so you're really best off not mentioning that to her face.