Subject Zero (A.K.A.) Jack. Is possibly the most debatable character in the Mass Effect series. Some people love her, some people hate her. I for one did not like Jack, Mordin, or Thane at first. But after playing through Mass Effect and getting to know them better. I fell in love with Thane (Not in a gay way) and he's even my Second Favorite Character overall now. And I've grown to like and respect Mordin and Jack. But what's your take on Jack? Love or Hate?