Azazel was a four-winged angel of the Rebel Faction. He was dispatched, incarnate, in 1456 to retrieve the soul of Merlin, which was promised to Hell by the immortal wizard in 956. Merlin managed to defeat the demon and forcibly reformed him into a sword of exceptional deadliness. Thereafter, Azazel was the Demon Sword, infamous across the globe.

In 2009, Azazel fell into the hands of the Agency, who stored it in the Vault. After the destruction of the Agency, the Vault fall derelict, but Azazel was retrieved by a group of Agency survivors in 2011. Raphael then took and destroyed it.