Nana Visitor was both opinionated and protective of Kira. I'm not sure whether she, Shimerman or Auberjonois expressed their opinion most, but Visitor was certainly one of the talent that was adamant with Behr about what she wanted Kira to do and not to do.Indeed, there is a sense that she always got her way. As much as she enojoyed stories that forced Kira to reconsider he attitude toward Cardassians, Visitor viscerally opposed any attempt to develop intimacy between Kira and Dukat. Indeed, Visitor has said that the sight of Alaimo made up as Dukat made her shudder and angered her. She was surprised how generous and charming Alaimo could be the first time he visited Visitor and Siddig at home. I think that attitude was on display during the season six arc, when Kira was being pushed into the role of a surrogate mother to Ziyal: she continued to oppose Dukat. I suspect quite strongly that the writers would have seen developing a closer relationship, whether romantic or familial, between Kira and Dukat as a dramatic failure. Indeed, Visitor's attitude toward Dukat is put to use in "Wrongs Greater Than Night or Death."