The story itself is good, the only negative point was that the author neglected some characters and their characteristics too much, I understand that it is a fan-fic, but an example, it is highly unlikely that Kisuke would trust two Vasto Lord in such a short time, he is extremely intelligent and very very careful, it would take a long time for him to trust them, and Aizen, he is so if not more intelligent and careful, you could have elaborated more on the protagonist's psychological war, for example Aizen testing the protagonist's loyalty and his partners while they try to somehow trick Aizen into thinking he is in control, after all Aizen is a manipulative and perfectionist master, the protagonist acts as if she is the owner of the place, Aizen would hate that, because he doesn't want one army, he wants pawns to serve as a sacrifice for him, he would never let the Hollows become independent of him, so it would have been interesting for the protagonist to have created this hierarchy and her schemes in the dark, away from Aizen, to be a surprise factor, of course it's a fan-fic, it's just a few points that I think would be interesting.