During the Kingdom Hearts Orchestra - World Tour - in Japan, the Japanese voice actress of Kairi and Xion, Risa Uchida, came onstage and performed lines. The Japanese voice actress for Aqua, Megumi Toyoguchi, later came onstage and performed some lines as well. These lines are canon to the story of Kingdom Hearts and explain some back story for Kingdom Hearts III.   You can view the translated Kairi lines thanks to @momo_krys on Twitter below:   You can view the translated Xion lines thanks