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List of Sword Art Online characters

Yuuki
Sword Art Online character
First appearance Volume 7, Chapter 3 (Novel); Mother's Rosario Chapter 1 (Cameo, Manga); SII Episode 19 (Anime)
Created by Reki Kawahara
Voiced by Aoi Yūki (Japanese)
Erica Mendez (English)
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Nickname(s) Absolute Sword

The following is a list of characters from the light novel, anime and manga series Sword Art Online. Most of the characters are introduced as gamers who play and consequently become trapped in a virtual reality massively multiplayer online role-playing game (VRMMORPG). The series chronicles their interactions in multiple online worlds: Sword Art Online (SAO), ALfheim Online (ALO), Gun Gale Online (GGO), and Underworld (UW).

Akihiko Kayaba is the director and creator of the NerveGear and Sword Art Online, as well as the main antagonist of the SAO arc. He traps all the players within SAO by using the NerveGear to obstruct signals from the user's brain. Any in-game death or attempt at removal of the NerveGear would result in the real-life death of the user. Later, it is discovered that he has been posing as Heathcliff, the leader of the Knights of the Blood Oath. Although he has the admin authority to make his avatar immortal, he is shown to be a powerful player even without his in-game immortality due to his intimate understanding of the SAO game mechanics which he himself had designed. His only goal in life was to make Aincrad a reality. He is destroyed by Kirito at the end of Volume 4, leaving behind a program that grants Kirito the World Seed. His death is his own doing since he has also rigged his own Soul Translator device to kill him when he is destroyed and transfer his soul into a digital form onto the Internet.

Richard Eisenbeis of Kotaku compared Heathcliff poorly to the series' second villain, Oberon, writing "How do you make a better villain than a man who trapped 10,000 people in a death game for no adequately explained reason? Easy. You just show how good that guy was by comparison to the new villain."

Nobuyuki Sugō is the main antagonist of the Alfheim Online arc. He is the one responsible for keeping 300 NerveGear victims, including Asuna, prisoner even after SAO had ended. He did this by transferring them all into ALO for experiments on human subjugation via fulldive technology. He also attempts to take over RECT Progress Inc. by marrying Asuna while she is unconscious. He displays a perverse interest in consummating this marriage while Asuna is still comatose. In ALO, he takes on the identity of Oberon the Fairy King and makes Asuna his queen, Titania. When he and Kirito finally meet, he flaunts his GM status as well as the results of his research by critically damaging Kirito by increasing Kirito's pain limit and impaling him. He is destroyed when the "Ghost Program" of Akihiko Kayaba reminded Kirito how he was defeated by Kirito's determination, before aiding him in overcoming Nobuyuki's GM status. Kirito then blinds and dismembers him after setting Sugō's pain limit to the maximum. All 300 victims are released from ALO, but Nobuyuki makes another attempt to attack Kazuto while he is making his way to Asuna in the real world, now blind in one eye and insane after his defeat. However, he is once again subdued by Kazuto, who puts the unarmed combat skills he had learned in SAO to useful effect. Nobuyuki is then arrested and charged for his crimes.


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