Laying in the silent cave, both injured, the former enemies—Mark and the Armor—had a conversation with each other. Not moving from their locations as they spoke.
Mark was the one to speak first.
What did the Armor mean when it said it was made out of an angel's heart?
That question of Mark's was met with a chuckle. Apparently, the armor truly was made using an angel heart as a material, and due to that reason—it had a very different way of seeing the world than a demon.
Until Mark used his Ultimate Demonic Art "Dream Input," the Armor had been a slave to its purpose. As long as it was for that purpose, it would do whatever was required to complete its purpose. If it had to not care about its own conscience, it would do that, too.