Just a reminder to stay on topic...
Yeah maybe we should start a thread titled "How important is Tim's cat to you?" :-)
Back on topic...the word "important" is an interesting choice as opposed to the more typical, "like", "love", "admire", "most beautiful", etc, that we normally see as associated with these types of discussions on OTMA.
I don't consider any one sister of more value to me over another, but "important" is another story. I think the most "important" for the highest percentage of us is probably Anastasia. Only because it is she, or more specifically the fanfare generated by her impostor claimants, that brought so many of us into the story. Certainly more so than OTM. Tatiana I believe, and I feel demonstrated by none other than Sarah in her terrific book, to be the most important family member during their sixteen months of captivity. Her grace and composure were unmatched. She was also the go-between for her parents and the guards. I think it was easy enough to see how capable she could have been, if given the opportunity to do so, after getting a look at her service as a nurse in the hospital.
Olga and Marie are wonderful and important in their own ways. But the Imp was my door into the rest of the family saga, and Tatiana I feel was the most important, overall, to the family in their greatest time of need.