If I remember correctly, Roxas could wield due to Ven's heart-- the heart of a keyblade wielder-- being inside of him. He was wielding Ven's keyblade.
That's not quite true. Roxas wielded
Sora's keyblade in his primary hand. Sora and Roxas even used the same keyblade
in different places at once.
A nobody of a keyblade wielder can always wield the keyblade of his/her somebody.
Roxas's
second keyblade was Ven's. As when Xion died, Roxas suffered an emotional shock, a shock which enabled him, together with him absorbing Xion, to gain access to Ven's injured heart and pull out/activate Ven's keyblade.
Oe98 said:
Namine' is the Nobody of a Princess of Heart, but she came from Sora, and she doesn't really have a body. She is something that really should not exist, even when compared to the other Nobodies like Demyx or Roxas.
She could be her own person, but she returned to Kairi-- leaving us to believe that she really is Kairi's Nobody, which means that Namine' didn't quite have a heart. I haven't finished RE:Coded, which was supposed to examine just what Namine' is (at least, for the characters), so I'm going to finish with "She's complicated," along with what I said above... and understand that she just couldn't wield.
Naminé is indeed complicated and Coded hasn't shed a definitive light on what for a type of being she "really" was (as she's now back with Kairi) either. But as she came from
Kairi's heart
using Sora's body and soul, she stems originally from Kairi. So, while Kairi's heart has the accidental inheritance ceremony and is
qualified as a wielder Kairi has not awaken as a wielder yet, no keyblade choose Kairi, so there is no keyblade for Naminé to wield, as her somebody doesn't have one.
Crystal said:
Wait,does Namine had a Heart? To wield a keyblade, it needs a heart ,right?
Some people suspect Naminé may had a heart because she seemed to have real emotions, just like Roxas.
Not exactly, the nobody of a keyblade wielder can always wield the keyblade of his/her somebody, because that nobody originated from the "wielder"-heart of his/her somebody.