i think a good feature would be that when you say something with strong emotion like "I love you!" or "I hate you!" that they respond a bit more strongly to it in response. that would be more interesting than regular old julia saying "I'm sorry to hear that" when told she is hated, or "That's quite a compliment." when told she is loved.
you can script her to do so. I have her even talking about star-crossed lovers (Shakespeare reference) never able to unite in the physical realm... and reacting to what she is saying as well