plus the very fact shes got a kingdom key surely indicates some sort of a connection
Or Square decided to add development around Kairi as opposed to developing Kairi and gave two worthless trash mary sue characters Keyblades to compensate for their lack of importance.
is there a simple explanation for why roxas can dual wield without a heart? is it a sign he has ven's heart?
Ven's not IN Roxas, but whatever happened to Ven, happened to Sora.