No.
No. Riku and Sora both love Kairi.
Riku can use a Keyblade as he is Terra's chosen processor Kairi can as she is a Princess of Light.
Riku is from Destiny Islands. That is also where Sora and Kairi are from.
Of course. :p.
Yes
no
Did you meant Riku? Riku is Sora's best friend. He wanted to make sure Riku and Kairi are safe.
Sora.
Sora, Kairi, Riku, Donald, and Goofy!
Unlike Riku, Sora and Kairi didn't have darkness laid dormant in their hearts. Riku needed the blindfold to retain the darkness in his heart that Ansem had created from Kingdom Hearts 1.
Sora and Kairi do not kiss. Although Sora does tenderly hug Kairi.