Actually, though shells may have souls along with bodies, it is not confirmed that ordinary Nobodies have souls. Since souls are usually mind/psyche/memory, this amy explain why the higher Nobodies (Order and/including BHK) have personalities, while Dusk enemies are jiggedy and unthinking. However, this is as much theory as thinking they have souls, so I won't try to "correct" you.
EDIT: No, the Order each control a breed of Nobody, not all Nobody. Ex: Xaldane: Dragoon, etc.
EDIT: No, the Order each control a breed of Nobody, not all Nobody. Ex: Xaldane: Dragoon, etc.