What's confusing? She can take on any biologically aesthetic, cellular, or physiological property so long as she has the material resources to generate it.
Psychopathic [b]in a sense[/b]. One characteristics of psychopathy is the lack of empathy and a lack of inhibition towards destructive intentions. She was happy, but she was also spoiled and given a sense of entitlement. She also realized they [i]feared[/i] her, fueling a sense of superiority in her. She thinks she's above almost all others, hence the lack of care for their feelings and lives.