|Nero is a lead character of Devil May Cry 4, marking his first appearance in the franchise and sharing a main role with series protagonist, Dante. An orphan that was adopted by the Order, he has grown up to be a Holy Knight in the Sparda-worshiping religion known as the Order of the Sword. He tends to not get along well with others and prefers to work alone, so he is usually given the Order's "special assignments." Throughout Devil May Cry 4, Nero perceives Dante as the enemy, but as the story progresses he realizes that it's the Order who is organizing their own agenda. Nero pivots his role as a Holy Knight to a renegade searching for answers, then into a vengeful demon slayer when the Order captures Kyrie. In the end, Nero and Dante join forces to defeat the Savior, saving Kyrie in the process. Nero and Dante part on good terms with Dante entrusting Nero with the sword known as Yamato that originally belonged to Dante's brother, Vergil.|
Nero wields a sword named Red Queen, a revolver called Blue Rose and the "Devil Bringer" powers of his demonic-clawed right arm. By defeating various demons, Nero is able to increase the power of the Devil Bringer. Nero later comes into possession of Yamato, Vergil's sword, which allows him a Devil Trigger that summons a Devil-Samurai avatar (similar to the possessed Vergil seen in the first game) to fight with him.
Nero has a connection with Dante's family which Devil May Cry 4 does not explain in depth. For one, Sanctus (the game's main antagonist) says that Nero has the blood of Sparda (Dante's father) in his veins. For another, Vergil's sword responds to Nero's call and even grants him his Devil Trigger form in the same fashion that Dante's sword do for Dante.
Nero is voiced by Johnny Yong Bosch in Devil May Cry 4.