Serrat, the Slayer's massive companion, is as protective of him as he is of his child. But, when said child, the only living heir to the Slayer's bloodstained lineage, is found exhausted and harmed in the middle of a demonic horde, the dragon-like mount becomes aggressive.

Serrat won't allow anyone to hurt the Slayer, nor anything that smells like his blood and genes. And he is amazing in the battlefield, even if he acts like a puppy when the Slayer is nearby.

UPDATE (20/07/26): I'll keep adding Revelations stuff as I keep playing and reading into the lore. For now, I only added a bit more of backstory. For obvious reasons, this might contain spoilers.