Sean Tabler (Cyber Wars)

Sean Tabler is one of the main antagonists in Cyber Wars. Slightly older than John, he has a burning hatred towards humans especially women and as he calls them, unworthy, worthless men. He is very sadistic, which he shows by leaking pictures from young girls destroying their lives and futures. He's also responsible for the Valentines Massacre, in which he indirectly kills 100 of innocent people by terrorizing a party with mustard gas and several drive by's in the city. 
He challenges John directly, after the latter has picked his interest. He views John as the only one, worthy of defeating him, viewing the battle between them as a game to see, who's the better one. His identity remains unknown till the S.F.A.T discover who he really is. Angry at the fact that they discovered his identity, he kills most of them by bombing their headquarter and by drive by's. After going into hiding, he calls John and challenges him to one last meeting. 
John however outsmarts Sean, by making him think, that he meets him, when in fact it was an Agent from the S.F.A.T while John acted like a SWAT member that brought the agent to the meeting. After Sean realizes that he lost, he shoots the agent only to get shot to death after.