The Exorcists are divided into groups to protect the four Generals; Cloud, Zokalo, Cross and Tiedoll. Allen and Lenalee are assigned to General Cross. On the way, Allen tells Lenalee his bitter memories of Cross and the tragedy of a good friend Nalei who became an Akuma to bring his sister back to life after she was killed. It was how he learned about the nature of Akuma and the tortured souls trapped within them.