Vergil is Dante's twin brother and is also the main antagonist in Devil May Cry 3. After he is betrayed by Arkham he temporarily teams up with Dante near the end, before reverting to his villain role. Throughout the game, Vergil seeks to undo the seal of Sparda inside the Temen-ni-gru and claim the entirety of their father's power for his own, regardless of the effects this will have on the human world. To do so he needed Dante's half of their mother's amulet, so he lured his brother out with the intent of taking it by force. Vergil battles Dante three times in the Devil May Cry 3 storyline. Their first battle is on the highest level of Temen-Ni-Gru, where Dante is soundly defeated by Vergil, who then takes Dante's amulet. Their second battle is at the very bottom of the tower, where the twins battle to a draw before their battle is interrupted. Their final battle is near the entrance to the demon realm, where Vergil is finally defeated. Vergil survives his encounter with Mundus, but becomes enslaved and apparently brainwashed of all his memories about his life and past. In the first game, he appears as a demonic dark knight, called Nelo Angelo. Dante encounters Nelo Angelo three times in Devil May Cry, and each time Nelo Angelo sees Dante's half of the amulet, he flees the battle. In their final encounter, Nelo Angelo uncovers his face to reveal that he is Vergil. In the end Nelo Angelo appears to explode, leaving his half of the amulet behind.
Edit: Vergil is extremely powerful and dangerous. Like Dante, Vergil possesses superhuman strength, agility, and stamina, as well as the ability to invoke his Devil Trigger. Due to his greater knowledge and experience with his demonic powers, he is able to use a more advanced teleport. As he does not consider firearms true weapons, he manifests Summoned Swords to use as long-range weapons. After being corrupted by Mundus, Vergil, now known as Nelo Angelo, receives new enhancements to his powers, though his techniques seemingly lose variety. As for melee, Vergil utilizes a real-life sword style with the Yamato known as Iaido, which involves attacks with both the sword and sheath. As of DMC3 still, Vergil is shown to be the most competent with wielding Yamato, striking so fast that the opponent does not realize they have been slain until he sheathes his weapon. His swordsmanship is noted to exceed that of Dante's. His sword attacks are so fast that the human eye can not see them in any circumstance. He was also able to awake the Devil Trigger before his brother.
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