Interesting... All three of these traits take one of Hisana's greatest strengths yet further. Wind Release: Chakra Shroud unlocks a whole technique-tree, apparently, while Mass Shadow Clone is (theoretically) a technique that lets you learn more other techniques faster.
@Tekomandor, Is that actually practical? Can Mass Shadow Clone practically be used, in this story by Hisana, to learn things faster? ("She has to spend a week saving up the chakra to use it and it doesn't last long" would be a reasonable-enough way to nerf and prevent this. Same with "she is brilliant... but not brilliant enough to stop full Mass-Shadow-Clone learning from melting her brains out of her ears" would be a slightly darker take on the same nerf.)