Based on the movie of the same name. When someone you truste believed was a confidante and shared things with, steals your ideas, connections and concepts for their own benefit. They begin to gain higher status than you and you see your ideas being prmoted by this person and they receive the kudos instead of you.
I am a 22-year-old woman, with a normal social life and a wide variety of friends. I have a good job in the media and lead a fairly exciting life. My cousin and I have always been close, but over the past two years we have become inseparable.
Her own circle of friends was limited so I introduced her. Directed by Barbet Schroeder. A woman advertising for a new roommate finds that something very strange is going on with the tenant who decides to move in. Spoilers galore, albeit for a 25-year-old movie. The novel was adapted for the movie by American screenwriter Donald Roos.
David Robinson, MD in Reel Psychiatry uses Hedra as an example of Borderline Personality Disorder (BPD). While I agree this character displays some such characteristics I believe trauma associated with the loss of her twin sister might better explain her behaviors.