Oathkeeper wasn't made from a promise. It was made from Sora's memory of Kairi in general. We don't know what Keyblades are made from. We know what Keychains are made from. Though we do know what Artificial Keyblades are made from. Artificial Keyblades are made from Hearts. Maybe only Pure Hearts of Light.
Keychain was cheaply made from the lucky charm, which hold pecial meaning, since it was tied to a promise.
Also, I'm sure Sora had plenty of memories of Kairi, so why not "I wanted to go in search of new world with her"-, "She was found on the shore"- and "We had fun at the secret cavern drawing pictures"-keyblades?
Memories are kind of large area to start picking keyblades..
They are the Body and Soul of a person who had a strong heart.
Usually. Often. I think I say this too much: it's a KH world, someones imaginery land made into a game. You can't trust what they say, because every given rule is too easy to change.
A special nobody is a Nobody born under special circumstances. Roxas is a special nobody because his somebody was still in human form whith all of his memories. While normal Nobodies have heartless without memories instead. Xemnas was a special nobody because he willingly casted off his own body but, he isn't even technically a special nobody he was said to have been special because of the circumstance under which he was born. Nomura did not list him as a "Special Nobody." It would help a lot if you didn't post random thoughts too especially, when they make no sense what-so-ever. I didn't post anything implying that it was the only possiblilty but, I simply explained why what your saying makes no sense.
We were supposed to be guessing his/her theory. It might not be so random, it might lead to his/her theory.
And how does this prove my theory wrong?
If I really would have been random, I would have said something along lines "Xion is Rikus/Kairis/Ansems/King Mickeys nobody!!!11!11"
It can make sense if you think it trough, and dicscuss the possibilities. Prove it wrong or right, I wont take it personally. But just sayig "It doesn't make sense." "It's not a keyblade."... It won't take us anywhere. They are just your opinions, and they hold no proof.
If you don't have a Body or Soul that's not a Nobody in any sense of the word. There is yet to be a being under which these circumstances have been created. So therefore there is no name for it. Nomura would not make another Namine. Namine is most likely going to be the only key character to fit under such circumstances.
You know Nomura personally? If you do not, you can never know what goes in his head. Actually, even if you did, theres no way you could know what he thinks. Really.
Namine is not a Keyblade, so I see no Namine copies in my theory.
Once again. What are you talking about?
Theres is only one so-called-way of normal creation of a Nobody. That is losing heart.
So, theres plenty of possibilities that could be called as special.