Cosplayer is Carlo Gazzola.
Alucard is a Transcendent Vampire and the main protagonist of the Hellsing anime and manga series. He is the most powerful weapon of the Hellsing Organization which works against vampires and other such supernatural forces. Alucard is no mere vampire; it has been implied that he is the most powerful vampire, as well as the most powerful entity in the entire series. (hellsing.wikia.com)