Irresponsible-not showing a proper sense of responsibility. (reckless, careless, impulsive)

Manipulative- characterized by unscrupulous control of a situation or person (scheming, calculating, cunning, crafty, wily, shrewd, devious, designing, conniving)
Disorders: Sociopath- a person with a personality disorder manifesting itself in extreme antisocial attitudes and behavior and a lack of conscience.

High functioning sociopathy- A term used to describe people with sociopathic traits that also happen to have a very high intelligence quotient. They are likely to be highly successful in the field they endeavor. They plan very meticulously and the presence of sociopathic traits like lack of empathy, lack of remorse, deceptiveness, shallow emotions, etc. makes it very difficult for "normal" people to compete with them.
Personality:Liza is a classic vixen, she uses sex as a weapon and can be immensely flirtatious without even realizing it. She can come off as mean or blunt sometimes, but this is primarily because she does not feel anything. For Liza to feel emotion, it is rare and very hard to do. She will reject any emotions before she feels anything at all. Because of this, she is very good at pretending. She can come off as an entirely different person before you actually get to know who she really is, she can manipulate almost anybody that she wants; and if she can’t get them to do what she needs them to do, she sees no use for them to be alive.

She cares only about killing and getting done what needs to get done, you won’t often see her doing any favors unless she is getting something in return, and she is certainly not someone to come too for advice unless you want a blunt, cold answer. This does not necessarily mean that she will not make friends though, it is very likely that she won′t be liked much at first, but after awhile she has learned to befriend some people.