Hellsing Ultimate

The Hellsing Organization protects Britain from vampires and supernatural threats beyond the reach of ordinary institutions. Its greatest weapon is neither an army nor technology, but Alucard, an overwhelmingly powerful vampire who willingly serves the organization's leader, Integra Hellsing.

After turning police officer Seras Victoria into a vampire to save her life, Alucard brings her into Hellsing's hidden war. A threat soon emerges far greater than isolated undead attacks: a surviving Nazi organization has created an army of artificial vampires and wants total war. As the Vatican and other forces enter the conflict, London becomes a battlefield between monsters who differ largely in which side they have chosen to fight for.