Kanamoto Atsushi

Johnny Black (ジョニー・ブラック) is a survivor of «Sword Art Online» and a member of the infamous red guild «Laughing Coffin», he was partnered with Xaxa. He was well known for using poisons and the such in battle. His real name is Kanemoto.

Murder in the Area (Aincrad 57th floor, April 2024)
In the SAO he appears during a Murder in the the Area incident along with PoH and Xaxa. Sometime after that incident the crusade is launched and he is captured along with others from Laughing Coffin.

Gun Gale Online
He serves as Xaxa's accomplice in the Death Gun Incident but is not captured.

Alicization Arc
He is also the one who stabs Kirito. However, while he was stopped, he succeeded in hurting Kirito severely.