Thread:Nivaans/@comment-5707992-20150222205719/@comment-5707992-20150222223336

I've seen that too and I think it's possible. Kaede already looks younger than she is, and since Shiro was the one who planted that false evidence it's entirely possible.

Anyway, that's most likely part of why she asked Nagisa alone. It takes an even greater power to conceal already great power and this would've been no exception. We don't know the full potential of Nagisa's bloodlust either so it would've been easier to use him as a mask as, like you said, anymore bloodlust would've been thought to have come from him.