Why did I miss this until now - I have no idea. .___.
Well, Roxas is a blend of both Sora and Ven I believe? (I still haven’t played BBS - i KNOW I’M WAITING FOR 2.5) So, theoretically, he IS Ven’s nobody as much as he is Sora’s. I’m really curious to see how all the stories will link up in III, considering we now have all the lore from BBS to consider.
It’s the same as, while Namine is Kairi’s nobody, because she was a part of Sora that’s why she’s got blonde hair. The other nobodies all closely reflect their somebody except for those two.