John Graves was a young Gear that took part in Operation: Lambent Insertion. He was a member of Dominic Santiago's squad, Delta-Two. He was a naive gear who acts before thinking.
During Operation: Lambent Insertion, Graves, ignoring his squad leaders orders, ran across a wooden bridge. He noticed as he was half way across the bridge that it was rigged with frag grenades. He was able to warn his fellow squad members to jump away and as he did so too, he was thrown across the platform and landed unconscious. The immulsion levels began to rise and as Graves woke up, he was too late to escape it. Unable to help their fellow Gear, the remainder of Delta-Two climbed a rocky wall to escape the immulsion, leaving Graves to burn up and eventually drown under the immulsion.