I wrote Kate off in the first couple of weeks as "the one chosen just because she's supposed to add eye candy". I deliberately had her written out for the first three weeks I'd say, I ignored her completely.
Then I noticed just how stable, steady and in control she was. She was the only one who never "played the game". She did what she had to do, and she didn't once come across as deliberately not pointing out a flaw, or being a pedant, just to get the P.M. into trouble. She worked solidly, and with very few mistakes. She got on with everyone and generally was bright and in control. She wasn't overly creative, which is the biggest fault I can lay at her.
Yasmina always seemed to have a face on her, sulky and petulant. She was driven, but I could never see what qualities she had that enforced her drive. She quite often missed the point and relied very heavily on others to just get on with it for her. Let's face it, she almost screwed up that soap task for Kate with complete stupidity.