Well, Kairi's is Destiny Place, as for Riku... depends on which one. He has 3. One looks
like dragon wing (Soul Eater), one looks a bit like Sora's exept black and red (Key of
People's Hearts) and one looks like Soul Eater but has angel wings on it (Way to the
Dawn).

kairi's keyblade is destiny embrace riku's key of people's hearts amd the soul eater

you might want to know riku only uses soul eater in kh2 while he looks like xhonorts
heartless

then when he looks like himself again he uses way to the dawn

Kairi's keyblade is called destiny's embrace. I think riku's keyblades are soul eater and
keyblade of people's hearts in the first game.