She looks like someone just said that they want something else for dinner, and she's pissed because she worked hard on it. "It's either this, or my fist. Pick one!" or "Cook you're own goddamn dinner then!"

Pretty sure this is outdated info.
Poison was in fact a "New Half" or Hermaphrodite as they're commonly known, in the Japanese version. Then things got crazy with American censorship laws and well, things got complicated.