Well, now that Tsukune possesses Alucard's Darkness, i guess you can consider him the embodiment of darkness itself, because other than Alucard, Tsukune is currently the darkest being currently active, while Alucard remains dormant, for now.....
To think almost two years ago Tsukune used to be human, teenagers grow up to be evil so fast, makes me proud!
But, isn't Tsukune just the coolest person you ever saw?