|Garfield Lynns / Firefly|
Garfield Lynns, also known as Firefly is a criminal and a patient at Arkham Asylum.
In Gotham City, the yellow rings of Parallax head to Arkham Asylum. There, Batman and Nightwing are doing their best to contain the newly powered inmates of Arkham, including Firefly, who have already been transformed into Yellow Lanterns. Luckily, Superman arrives just in time to offer assistance to Batman and Nightwing.
Superman tries to control the situation but his inexperience with his power ring doesn't help at all, so Bane and Firefly attack him, while he is protecting the doctors. After this, the Yellow Lanterns stand still and kneel before him. Parallax suddenly appears behind Superman, having John Stewart under his control.
Batman fights with Firefly and during the battle he tricks Firefly into colliding to a building. There Batman finds the chance and takes the yellow ring, which tempts him to become his new bearer, from Firefly and then puts it on his analyzer on the Batplane and sends the data to Watchtower and S.T.A.R. Labs.
After their rings get rebooted and they lose their powers, the inmates of Arkham fall from the sky unable to do anything to escape from their eventual death but fortunately Superman manages to save them all.
After Parallax's defeat, all the now depowered criminals return to Arkham Asylum.
In the Comics
Garfield Lynns is a down-and-out film visual effects expert who attempts to rob a theater by faking a fire, only to be stopped by Batman and Robin. He escapes and in the darkness Batman sees a distant firefly, which he mistakes for Lynns' lit cigarette and chases in the wrong direction. Inspired, Lynns becomes The Firefly, using various lighting effects and optical illusions in his crimes.
The second Firefly is Ted Carson, an ostensibly wealthy gold mine heir who gambles away the family fortune and turns to crime to maintain his lifestyle. He is also Bruce Wayne's rival for the affections of Kathy Kane.
Post-Crisis, Firefly works primarily with fire instead of lighting effects and he also displays a pyromaniac streak. Garfield Lynns is originally a pyrotechnic expert for motion pictures, but falls victim to Gotham City's severe poverty and turns to crime, displaying signs of pyromania. Lynns is captured by Batman and Robin after his first robbery. He takes up arson as a hobby, but it soon turns to an obsession: he believes he can see visions in the flames. Inspired by actual fireflies, he builds a suit and becomes a professional arsonist. Early in his criminal career Firefly becomes the protege of Killer Moth, looking to duplicate the success of crime-fighting duo Batman and Robin. The alliance falls apart when Killer Moth realizes the full extent of Firefly's madness and fears for his own well-being.
In the Knightfall storyline, Firefly's plan after his escape from Arkham Asylum is to burn all the places he didn't go to as a child. He successfully destroys his first two targets, but Batman captures him at the site of his third, the Gotham Zoo. He has been locked up so long he has been mostly forgotten. Knightfall marks one of the few moments where Lynns face is revealed. In an attempt to burn Gotham to the ground, Firefly is horribly burned when the chemical factory he targeted explodes. He suffers burns over 90 percent of his body and is ultimately sentenced to Blackgate Prison.
Later, Firefly is recruited by a new Black Mask to a part of a group of villains that aiming to take over Gotham, but he follows his own agenda. Inspired on the chemicals that Black Mask used on him, Firefly inserts chips in Gothamites in order to make them burn.
In the New 52, the Firefly seen is Ted Carson, a former high school teacher who tries to incinerate everything that will separate him from his ex-girlfriend, Cindy Cooke. He seemingly murders Garfield Lynns along the way and attempts to use Lynns (a known pyromaniac) as a scapegoat for his crimes. Ted Carson was defeated by Nightwing and Batgirl.