The most confusing thing in KH

               It took me a while to fully understand everything concerning Terranorth/Xehanort/Ansem/Riku/Riku replica/Terra/ Xemnas's relation, and I know that a lot of people are REALLY confused about it... this chart explains it pretty well ~~>
Click to enlarge it

Pretty much sums it up...

Xehanort, Ansem, Terra, Riku.

       Indeend, there are a thousand people with the basically same identity, all arround Xehanort and Ansem...hahahaha