Vampire

Pureblood is aristocratic, cruel, arrogant, and intensely proud of his heritage. He regards himself as fundamentally different from monsters created through mutation or monsterization, emphasizing that he descends from an old vampire family and has consumed human blood since childhood.

That pride extends into combat. Pureblood initially treats opponents as prey and confidently relies on his speed, regeneration, and natural advantages. He nevertheless possesses enough combat awareness to recognize when an enemy's unusual physiology changes the conditions of a fight.

Pureblood is an exceptionally capable Demon-level monster with enhanced strength, speed, agility, reflexes, and regeneration. His reactions are fast enough to catch bullets, and he can throw captured rounds back with enough force to penetrate flesh.

His vampiric body can recover from serious wounds by consuming blood. This allows him to replenish himself during battle as long as suitable victims are available. He also possesses sharp claws and fangs suited to close-range killing.

Pureblood's speed is particularly dangerous against conventional firearms. He can move rapidly enough to intercept gunfire and attack vital areas before an ordinary human can properly react.

Pureblood participates in the Monster Association's operations and later remains inside its underground headquarters during the Hero Association raid.

There he encounters Zombieman, whose apparent humanity initially makes him seem like straightforward prey. The resulting battle instead pits two highly regenerative combatants against one another.

Pureblood repeatedly inflicts wounds that would be fatal to an ordinary person, while Zombieman continues recovering and counterattacking. Their fight lasts roughly half an hour, during which Pureblood deals around two hundred potentially lethal injuries to the S-Class hero.

Zombieman ultimately outlasts him. Pureblood's regeneration cannot match the extreme persistence of his opponent, and he is eventually killed after exhausting the advantages that normally make him so difficult to defeat.

Zombieman is Pureblood's principal opponent and the hero who defeats him after a prolonged battle of attrition.

Gyoro Gyoro serves as the Monster Association's military strategist during Pureblood's membership in the organization.

Orochi stands at the head of the Monster Association hierarchy as its Monster King.