I agree about her eyes... she has psychopath eyes. I don't know if she's a psychopath, but this description from Without Conscience applies to her perfectly:
Many people find it difficult to deal with the intense, emotionless, or "predatory" stare of the psychopath. Normal people maintain close eye contact with others for a variety of reasons, but the fixated stare of the psychopath is more a prelude to self-gratification and the exercise of power than simple interest or empathic caring.
[...] Whatever the psychological meaning of their gaze, it is clear that intense eye contact is an important factor in the ability of some psychopaths to manipulate and dominate others.
Again, I have no idea what she may or may not be classified as, but she fits the bill. Her eyes are frightening, I can't imagine Travis being stared down by her in his last moments.