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.

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.

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 Kirito saved a Non-Player Character (NPC) from being sacrificed to a monster by other players and rumors of his deed spread, Genesis decided to see the other player for himself, and rejected the former's request for a duel with him, deeming him to be not worth the effort..

Later, in the field, Genesis was in a 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 an mysterious action with his in-game menu before reengaging the dragon in combat and defeating it.