Who is death gun in sword art online 2?

Death Gun is a major antagonist in the "SWord Art Online II" arc, specifically in the "Phantom Bullet" storyline. He is a player-killer who uses a gun in the Virtual Reality game Gun Gale Online and has the ability to kill players in real life by targeting their real-world identities. His true identity is revealed to be a character named Shouichi Shinkawa, who is associated with the original SAO incident. Death Gun represents the darker themes of the series, highlighting the dangers of virtual reality and the blurred lines between the game world and reality.