If an Awakener were to die, their body will not decompose but is revived as Immortal instead. Only when an Awakener loses a Rivalry and their Deus-Excellion's strength is absorbed, the Immortal Awakener will die.
When a Deus-Excellion is destroyed in battle, it takes time for them to regenerate. Defeated Awakeners wind up as imperfect Nosferatu in most cases. The area in which Class VII fights Loa Erebonius in Trails of Cold Steel is a graveyard of fallen Divine Knights and their Awakeners.
List of known Awakeners
At present the following Divine Knights are known, sort by the order of appearance: