Nelo Angelo
A commonly seen (and quite mysterious) enemy from the popular videogame, Devil May Cry. Not much is known about this character, but the player eventually learns that it is Vergil, of Dante's rather disfunctional family. Boasting incredible speed and unbelievable demonic power, he is a great match for Dante. He is also the main focus of the upcoming prequel, Devil May Cry 3: Dante's Awakening.
"Uhoh... Nelo Angelo AGAIN? I thought I killed him..."