Kobatz

Cobert (コーバッツ) is one of the 10,000 players who were trapped in Sword Art Online and was a lieutenant-colonel in the Aincrad Liberation Force.

Personality
He is a merciless and stubborn person, driving his men to their limits, and forcing them to fight a difficult and pointless battle even when exhausted and without proper preparation.

Aincrad Arc
Cobert first appeared (though not mentioned) in Volume 1 Chapter 8, leading a platoon of high ranking «Army» players through a forest into the 74th Floor Labyrinth, walking past Kirito and Asuna, who were hiding behind some trees in the forest. Asuna reveals that there has been a rumor that the Army has been changing the way they were working to show that they are still contributing to clearing the game and, for that reason, small elite platoons were rumored to be sent to the front lines. She speculates that the platoon that they had seen were planning to attack the Boss of the Floor for reputation.

Cobert later encounters Kirito, Asuna and the Fuurinkazan in the Labyrinth, demanding map data from them, thinking that he as a member of the Army had the right to have it for free, even though mapping is a difficult task. After receives the map of the Labyrinth up to the Boss Room from Kirito, he orders his men to move out and heads towards the Boss Room. During the Boss Fight, he is killed by The Gleam Eyes due to his party entering the Boss Room without appropriate preparations and Cobert refusing to let his men retreat from the battle.

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