Calix Avantes is a seasoned battlefield veteran, having served during the Corinthian Crusade, the Badab War, and over seventeen engagements thus far during the Lamenters crusade. Though those of Sanguinius' are notoriously long-lived, members such as Avantes are still impressive, having battled in the name of the Emperor for over eight hundred years. He wears the full silver armour of the traditional Sepulchre Guard, as do many Calix' of high rank. His combi-flamer, 'Ember' was hand-crafted by Techmarine Ignacio during the Badab War. After the blow of the Battle of Optera, it was Avantes who became the emotional leader of the remaining prisoners of war.