Board Thread:Questions and Answers/@comment-26636534-20151103201658/@comment-26689808-20151103204325

Interesting points to bring up:

1) I think it varies, because the development of a Kakuja is only triggered rarely after repeated cannibalism. I assume once the Kakuja development has started, continued cannibalism increases the growth of the Kakuja.

2) It seems like detachable Kagune's are only compatible with specifically inherited Kagune's. However, Eto has demonstrated that she was able to obtain this ability herself over time, along with the many other unique abilities that she now possesses.

3) Nobody knows what the Kakugan actually does, if anything. Note that ghouls who were unable to control their Kagune were also unable to control the activation of their Kakugan.