She is a confusing character, she can certainly be mean and snobby liker her husband and son. She really doesn't want to be a death eater, and she isn't. She just follows her husband. And she showed that she is caring because of her devotion to Draco, and by lying to Voldemort; saying Harry was dead. If she had the choice to follow Voldemort, or to live a normal familt life; she would most likely choose the family life. I think she is mean, to others who aren't of her blood status, but she isn't really, extremely mean; and certainly not evil.