Valvatorez is a former tyrant and vampire who gave up on his powers and atrocities after promising never to drink blood again until he manages to instill fear into a girl he met 400 years ago, Artina, who died before he could do so. Valvatorez has a strong sense of pride and dignity, and considers keeping his promises as his utmost concern. He has a fascination and complete obsession with sardines, believing sardines have allowed him to regain some of the power he has lost after vowing to never again drink blood.