Grimlock

Grimlock is a player in Sword Art Online and a former member of the guild Golden Apple.

Background
He was the culprit of his in-game and real-life wife, Griselda's death. He killed her because he didn't like the change in her personality. At first he didn't want to aid Caynz and Yolko in their plans to catch the Griselda's killer by forging them weapons to use in the in-AREA murders. Evenutally he did, but not with good intention. He help so he can have Caynz, Yolko and Scmitt together and get them killed with the help of the Laughing Coffin. But the plan fail, because Kirito came to the rescue. He is caught by Asuna. It is unknown to what happen to him in the remaining time of SAO, but in the end, he was logged out.