From Path of the Vampire Wiki
Ramiro Barros was the oldest and most powerful Paladin in existence.
He lead the Order of Saint James of the Sword for many years before they were utterly destroyed by the Vampires of Harper Rock. The Order of St. James originally 'owned' a few territories, as part of the Chapter 5 underworld war. However, a joint effort between Tytonidae and Things resulted in a final battle (between the Order and Things), in which the Order was obliterated, its remaining few members fleeing from Harper Rock.
After the battle, Ramiro Barros was out for nothing more than vengeance and blood. His rampage lasted for days until he was killed on February 9, 2016 by Mortll