Rosalia

Rosalia is one of the 10,000 players who were trapped in Sword Art Online as well as the leader of the orange guild «Titan's Hand», she was caught by Kirito and sent to the prison managed by «The Army».

As the leader of the guild, and in order to maintain her "green" status, she looks for victims and lures the players to a place where the other members of the guild attack and loot the player, while she maintains her «green cursor» to avoid suspicion.

The Black Swordsman (Aincrad 35th Floor, February 2024)
She and her guild led an attack against another guild «Silver Flags», leaving only the leader alive. The leader of Silver Flags begs Kirito to send her to the «Black Iron Castle» dungeon, to which Kirito accepts. A few days later, Rosalia tails Silica who is on a quest to get the «Pneuma Flower», waiting for an opportunity to ambush her and steal the precious flower. Kirito sees through the surprise attack, and Rosalia orders her men to attack the Black Swordsman. However, the attempt to murder Kirito fails, and he sends her guild into the dungeon. Rosalia tries to persuade Kirito to form a party with her, but he ignores her pleas and sends her headfirst into the dungeon.

It is presumed that Rosalia logged out of the game after Kirito killed Heathcliff, prematurely clearing the game.