Unlike the other Watchers, he doesn't interrupt Enoch's ascension of the Tower.
Chapter 02: The TowerEdit
Along the other Watchers, he welcomes Enoch with his trademark scream.
Chapter 07: The Cry of ArmarosEdit
When Enoch arrives in Armaros' show room, the Watcher appears on scene and starts dancing without paying attention to Enoch. Then the lights go out, enabling Armaros to change into his Watcher Armor; then he battles Enoch seriously.
Despite the Archangels warning, Enoch dives into the Darkness in an attempt to save Nanna. Armaros tries to follow him but can't, and is left alone weeping in show room, overcome with grief from Enoch's selflessness.
Chapter 08: Belial's TemptationEdit
Armaros is crying Enoch's fall into the Darkness. Lucifel persuades him to go and save Enoch and the Archangels give their blessing to Armaros so that he may descend into the Darkness. Renewed with determination, Armaros proceeds.
At some point, he encounters Nanna unconscious and witnesses Ishtar's unsoiled soul entering Nanna.
After some searching he finally encounters Enoch, completely consumed by the Vileness, and wearing the Dark Armor.
After a hectic battle, Armaros completely destroys Enoch's Dark Armor, however, it angers Belial who unleashes the vileness on them. Lucifel intervenes, brining Enoch out of danger, but leaves Armaros to be consumed, shouting with despair.
Chapter 11: Semyaza's Dream Edit
Enoch is able to inflict considerable damage to Dark Armaros, but Armaros manages to destroy both Enoch's armor and weapons, leaving him unable to defeat Dark Armaros.
However, Ishtar intervenes by throwing to Enoch one of God's weapons, and with the help of Uriel he finishes off Dark Armaros.
Before disappearing, Armaros manages to thank Enoch for putting him out of his misery.
- It is hinted that Armaros might be still alive, since a scene after the credits and after Lucifel's lines of dialog, shows the Water Nephilim, Armaros's son, swimming peacefully in the abyss.