Board Thread:Questions and Answers/@comment-27322187-20160118142216/@comment-25955276-20160124230911

Hmm, some of the things don't seem to have very much evidence. For the first question, yes. In the fight between Aogiri Tree, as mentioned before, Touka seemed to be in pain while Ayato was eating her kagune. Though, no other reactions have been seen with eating kagune, since most other "kagune injuries" are the kagune being impaled, which most reactions to have been very neutral. Though, the neutral reactions could be added up to them being in a battle state pumped up with adredeline.

For the second question, it's actually difficult to tell. In Tokyo Ghoul and Tokyo Ghoul :re, there's many incidents in which Eto's kakuja is sliced off, and in Tokyo Ghoul :re, she practically leaves behind most of her entire Owl kakuja. However, in none of them, it doesn't show any sign of her being weakened by the loss of the kagune. It could be just the fact that Eto is so powerful that losing the rc cells would do nothing, or it could be that the kagune contains only a superficial amount of rc cells that a kakuhou holds. The quinque seems to hint that it could be that losing kagune could actually lose rc cells, as most occasions in which a quinque is torn apart, the quinque is destroyed since the kakuhou only has an a finite amount of rc cells. Quinques can be repaired, so it still is hard to determine whether or not losing parts of a kagune/all of a kagune will affect the rc cell amount, as the process of repair is unknown.