Board Thread:Theories and Speculation/@comment-38812954-20191220140944/@comment-25122992-20191225151633

Again, dude, you are misunderstanding something. Ten-Tails wasn't supposed to be a separate being controlled by Kaguya, the anime got it wrong. In the manga and other sources, it's clearly stated that Kaguya merged with the God Tree to become Ten-Tails (i.e. Kaguya + God Tree = Ten-Tails).