Why not break the norm and start? For the others, at least, they still were, in essence, their other selves. At one point Roxas's Somebody was alive and well with him here, even. "If you're feeling now, maybe you're getting closer to being a Somebody again."

The other Nobodies might just simply revert, or assume the identity, who knows, if that's the case. "Might make it easier for dealing with the changes?"