Chieftain Caecili is Chieftain of the Covenant Heretics. He belongs to the council of Heretic Leaders, and is one of seven Leaders. Caecili has strong opposition to the Separatists, due to their attitude towards the humans. Caecili has a strong rivalry with 'Refum, but they work towards the same goal. He is currently aboard the Hammer of Crisis, the Heretic space station devoted to the training of new Heretic soldiers.