Arya is giving up her name; no one will remember that her name is Arry. It will be approximately a 3. Suzaku will be giving up the memories of one person that is in aather that he loves (lelouch, beatrice, nunnally, or euphemia). The Personae are allowed to pick which person he will forget. His will be a 9.

If their offer is not accepted, Arya will be the one to die.