Nana Visitor - She really loves Kira, and it shows. The way she talks about her, it's like she exists somewhere else and yet is part of her, too. It's a unique way that isn't at all odd like it may sound. Always has good stories, and is just a friendly presence.
Never met her, but I totally get this. Whenever she get going about Kira in docs or interviews or what not, her face just lights up in a way I don't think I've seen from any other Trek cast member.