Alucard Aizen

Alucard Aizen(アルカード愛染,Arukādo aizen) is the former Templar crusader and captain of the 5th Division in the Templar army. He later leaves his Humanity and his Templar waves to become a Vampire too waging war against the Human with an army of Vampire, Alucard is no mere Dictator; he has been implied that he is the most powerful vampire  worldwide and may be the most powerful character in the series,