Trowa: *Ahem* If you won't mind, I'd like to explain this one. Ansem owns the body, and a large portion of the mind, but his split personality Kounetsu takes up a portion of the mind too, and tries to take over most of the time, but Ansem can stop him, most of the time. But, if Ansem allows Kounetsu to go, then he can use Ansem's body any way he likes. It works the same with us. We all use Seto's body, and apparently, kicked him out

Seto: They left me to talk whenever I want, I just don't want to. These personalities take everything outta my mind and say it. Wait, they are my mind....

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Albedo: *Laughs maniacally* What heart? You mean that insignifacant knuckle placed into your body? *Laughs* That won't do a measly thing... And for your information, attacking the body does work, except you'll have to risk destroying the other personalities. *Laughs maniacally*