
Originally Posted by
kkck
Well, the issue in this case would be that plot wise as far as we saw the captains do not particularly need a powerup. The captains were in a bad position during the war because they were unable to use bankai, their power was limited to a fraction of it, while the stern rittern could use all of their power. An actual power boost becomes even more unnecessary plotwise when you consider just how many allies SS has. Currently there are 12 captains, orihime, chad, ishin, urahara, tessai, yoruichi, lisa, hiyori, love, rose, hachigen, the royal guards, kukaku, ganju and the fullbringers. Even if there are over 20 stern rittern left and juhabach the numbers actually fit for a nice confrontation so far. The issue at hand as far as the shinigami allies are concerned is not in itself getting a power boost but rather being able to use their full power in battle.
The issue at hand as far as a potential powerup for the guys at the royal palace right now is that there is no reason in particular for all of them to not get exactly the same benefits from the food (except for ichigo who is the one with the greater amount of actually dormant power contrary to renji, rukia and byakuya who do not have any dormant power, they have to literally become stronger the standard way). All of them went through the spring treatment, they will all likely get the special food and they will all perhaps get their zampakutos back into proper shape (ichigo and renji have their bankais broken and we have seen byakuya's sealed blade and rukia's shikai get broken once and there is still the possibility that byakuya's hakuteiken got some long term damage which can be repaired by nimaiya now even if his bankai is no available right now). There is also the consideration that while byakuya is a captain level shinigami he is still comparatively young by shinigami standards, there is no reason for him to not be able to grow stronger.
Note that I did not say I thought any of them would be going through a significant power boost though. I just think that all of them will enjoy the same comparative fruits from being properly healed and eaten kirio's food.
Taking in consideration how kirio's food works I don't think actually putting the gotei 13 through her food is an option at this point. The method she uses to feed people is extreme to the point of making her skinny overnight. If she depletes her reiatsu at that rate then obviously feeding more people puts a much greater strain on her body. Feeding the entire gotei 13 has the implication that she has to have enough reiatsu to do so. If just two people got her that thin then I can't imagine her doing more than a few at a time. Then we have to consider how long it takes for her to get her fat back. In all likelihood 4 people is just about as many as she can handle at a time, the number was likely not random (and coincidentally it would also be the number of royal guards she would have to feed at a time if she ever does that).