I was thinking Riku has some sort of connection to Master Xehanort because of their hair. I mean, how many other people in the game have gray hair besides them? (excluding Xehanort for obvious reasons) Even if it's not a big, deep connection, I at least feel that they do have one. Agree, disagree?

Actually, considering age and all, it's quite possible that Xehanort is actually Riku's grandfather o.O But their hair color is a bit different; Xehanort's being more of an actual silver, and Riku's being a bit on the blue side. Genes are known to go through slight mutations with each generation, so that can easily be dismissed. But then again, aside from Ienzo-Ansem, family connections aren't important in KH.

 

But hey, it's just hair.

It's possible, but like Reversal said, Riku's has a bluish tint to it.

the only resembelance I see with both of them is the hair. how long their hair are. MX had silver long hair. and Riku had more of a purpleish hair but nothing else to me