Midori Sato is a jealous, vindictive woman that enjoys the torture and pain of seeing others kicked down by life. She believes that everything should revolve around her and that she's better than anyone she meets because of her extreme wealth and good fortune.

Under her cruel exterior is a woman that longs to be loved by a man that has no interest in loving her back. She has gone so far as to force her father to place the man she loves into a loveless marriage.  She'll do anything she can to take the man she wants as her "king" even murdering the person in her way. 

Note: Midori isn't a good person. She is very much like the evil queen from Snow White. She has jealousy in her heart and thus it becomes her ultimate downfall.