“You ignore my warnings?! I will show you no mercy!”
― Vellum, at the start of his boss fight
Vellum is one of the four main bosses of Root Abyss, working for Damien to restrict the World Tree's power. He is the final boss Alicia requests to defeat.
He is encountered by the player earlier, where he stands as a rock statue. He is awakened by the player, but shows mercy and kicks them out of his lair, and that next time they meet, he will not be as merciful.