Before you go on, I though we discussed her being the right/left hand? It would actually be a better option in my opinion, as the espada are sort of on lock down within Las Noches until further notice. At the same time, this keeps the espada seats open for other people, even if we don't have a lot of willing or skilled enough people as of yet. That is opt to change, but I'd much prefer the right or left hand.
As a secondary notice, I won't allow more than one legendary category in the skills area. That would require a huge amount of training, that can't be achieved in one lifetime. If you'd like to keep it, then I want you to. Null your swordsmanship skill completely, since Sanijishi won't have an actual physical sword, as far as I know. Tat gives you the ability to have more training time, since you don't have to worry about using a sword as well.