Genesis

Genesis (ジェネシス) is a game adaptation-original character introduced in Sword Art Online: Hollow Realization. He is known as the «Black Swordsman» (黒の剣士) by the players of Sword Art: Origin. It was later revealed that he is in fact a famous hacker known as the «God of Cheats» (ゴッド オブ チート).

Personality
Genesis is known to get strange looks when he is fixated on battle and he enjoys stealing the hard-earned kills of other players.

It is revealed later that he hacked the safety features of his AmuSphere, modifying them so he can use what players refer to as the "digital drug" without the AmuSphere's player protection protocol to eject him from the game. Using this power causes his stats to sharply rise so he can take on any enemy thrown his way. However, using this for too long takes its toll on his body, shown as he is forced to give up a fight with Asuna because of the intense pain coming over him.

Hollow Realization
While Kirito and Argo were attempting to clear the second area of Ainground, Genesis was surrounded by other players, who angrily complained to him for stealing their kills, but he only mocked the players before departing.

After rumors of Kirito saving a Non-Player Character (NPC) from being sacrificed to a monster by other players spread, Genesis decided to see Kirito for himself. When challenged to a duel during their encounter, Genesis rejected the request, deeming Kirito to be not worth the effort.

Later, in the field, Genesis was in battle with a dragon when Kirito's group encountered him. As Genesis was overwhelmed, Klein offered to assist, but Genesis rejected the offer. He then performed a mysterious action with his in-game menu, before reengaging the dragon in combat and defeating it.

While traversing the third area, Genesis defeated a monster that he believed was the Area Boss, and thus quickly spread word of his deed. His glory was short-lived, however, as he soon realized that the enemy he had fought was a decoy, while the real boss was dispatched by Kirito's group. Angered by this, Genesis approached Kirito in town, telling him of his belief that only the strong were meant to rule in the virtual world.

At a later time, Genesis encountered the other goddess meant for Premiere's original quest. While Genesis was secretly spying on Kirito's group after this encounter, he discovered the truth about the Grand Quest by witnessing their hack of an administrator console in the desert area.

By the time Kirito's group arrived at the location of the fifth Sacred Stone, Genesis had already found and claimed the stone with the aid of the second goddess. Before departing, Genesis informed Kirito of his plan to finish Premiere's quest and enjoy watching the new Aincrad burn to ash.

He later finds his way to a quest only location, accessible only if the player is partnered with one of the two goddesses. When they refused to give him the last Sacred Stone without both girls, he used his NPC to slaughter them without mercy. When Kirito and Premiere arrive on the scene, he automatically sets his sights on taking Premiere. As Kirito was forced to fight the other goddess to protect Premiere, Genesis attacks him while he's caught off guard before ordering her to deliver the final blow. But before she can, Asuna appears and challenges Genesis to a fight. He quickly activates the mysterious action that grants him his savage power, better known as the "digital drug", to boost his stats. However, the fight ends prematurely when the backlash of his power causes him intense pain, forcing him and his NPC to retreat. But before leaving, he tells Kirito he will settle things at the Temple of Prayers, the final location in the quest.