Birth by Sleep My new theory.

so... i was just thinking one day and i came up with this theory about connections between people. first off, there must be a Terra-Riku connection. in the scene before u fight terra in FM+, terra calls sora "Xehanort." maybe his thoughts were 'he stole the keyblade from riku.' so i think terra chose riku to get the keyblade. so maybe this means master Xehanort stole a keyblade before. Then is the kairi-aqua connection. i think that aqua might be related to kairi, like a mother-daughter connection. that would explain why they look so much alike right? Finally is the Roxas-Ven connection. my reason why they look alike is maybe the chasers are partly the soul of the keyblade. and maybe terra tried to give the keyblade to riku, but failed for a year or so. so ven chose sora, but for a while, gave the keyblade to riku, but realizing riku was using it for darkness, gave it back to sora. and maybe, when the keyblade master becomes a heartless, they create a nobody which looks like the chaser which gave them the keyblade.

well thats what i think.

 

Now who said those three were chasers? Seriously..