Sword Art Online: Re:Designed

After witnessing the death of her closest friends, Kiriko swears vengeance on the people who killed them. Her rage slowly consumes her until she kills any orange player she sees. Deeming this "Killer of Killers" a growing threat, the lead group tries to capture her. Little do they know that the very person they're looking for is right under their nose. (AU, DarkFemKirito/Sinon)