The origins of Larfleeze, also known as Agent Orange, remain shrouded in mystery, largely due to the actions of the Guardians of the Universe. According to his own account, Larfleeze was one part of a group of five thieves who wanted to pull off the greatest heist in the history of their guild. They raided the planet Maltus, where one of their own was lost, and stole several treasures, mainly a box and a map. The box was supposedly worth more than an entire star system, for it contained Parallax, the sentient embodiment of fear. The other thing they stole was a map made by the fallen Maltusian Krona, said to contain something very valuable.
Making their way to Okaara, they entered the Forbidden Forest of Weeds. Another of their group was killed by the forest, and the others fell into a temple. Inside was an Orange Lantern Power Battery. Mesmerized by it, the three remaining thieves started fighting among themselves for the Lantern. The Guardians then arrived with a force of Manhunters. However, their power was drained by the orange light, and several Guardians and Manhunters were killed, along with a third member of the thieves, leaving only Larfleeze and Blooch remained. The Guardians then said that all they wanted was the box containing Parallax. If the two would give it up, they would be allowed to keep the Orange Battery, as long as it stayed buried in the temple on Okaara. Additionally, only one could own the battery. Larfleeze and Blooch accepted the deal, and then fought to the death. Larfleeze won, and became the sole wielder of the Orange Battery, then known as Agent Orange.
When the Sinestro Corps War ended, multiple Yellow Power Rings made their way to the Vega system, and the Guardians authorized the Green Lanterns to enter the system and capture the rings and their bearers. Agent Orange tolerated them as they did not head to Okaara. However, the Controllers, aware of the coming War of Light, decided to seek out the orange light and harness it for their own power. Journeying to Okaara, the Controllers discovered Larfleeze's underground palace and entered. They found the Orange Lantern Power Battery and attempted to claim it, only for Agent Orange to unleash the Orange Lanterns from the battery to kill the Controllers. Enraged at this perceived violation, Agent Orange sent the Orange Lanterns to capture the Green Lantern Stel, who was pursuing a member of the Sinestro Corps. Stel was captured and seriously damaged, and Agent Orange ordered the Orange Lanterns to brand Stel with their seal. When the Green Lanterns recovered Stel and returned him to Oa, a hologram of Agent Orange burst forth and confronted the Guardians about the attempt to steal the Orange Battery. Although the Guardians pointed out that it was the Controllers who had entered Vega, Agent Orange refused to listen, and declared that the treaty was null and void, and that the Guardians would submit to his demands or face the wrath of the Orange Lanterns. Saying that the Guardians did not negotiate with terrorists, the Scarred Guardian blasted the Agent Orange hologram and presented a motion to repeal the Vega ban.
Despite reservations, the Guardians went ahead with the repeal of the ban. Making their way to Okaara, the Guardians and the Green Lanterns were soon attacked by Orange Lanterns. Larfleeze's lanterns began draining the energy from the constructs the Guardians and the Green Lanterns created, and managed to kill Gretti and steal his ring, adding Gretti's power to his own. However, Larfleeze quickly realized that Hal Jordan had a Blue Lantern Ring that he could not drain. Intrigued, Agent Orange dragged Hal underground and demanded that he surrender the ring.
Larfleeze touches the ring in his desire for it, and is forced back by the power of the blue light (the ring itself claiming that "hope is selfless"). This enrages Larfleeze, who bargains with Jordan over it, telling the history of how he got the Orange Lantern Power Battery. Though Jordan agrees to give the ring to Larfleeze, he finds he is unable to remove it. Not finding this to be an acceptable answer, Larfleeze creates an axe from the orange light and removes Jordan's hand by force. No longer attached to Jordan, the blue power ring welcomes Larfleeze to the Blue Lantern Corps.
For a moment the constant hunger he feels is pacified, but the relief is temporary as the reader is shown at the beginning of the following issue that Jordan's blue ring created an illusion to deceive him. Sensing Larfleeze's hope for relief, it made him believe he gained the blue ring he desired when in actuality he had never cut off Jordan's hand at all. Jordan returns to battle Larfleeze with the Green Lantern Corps. During the battle, Jordan is possessed by the overwhelming orange power of avarice after briefly seizing Larfleeze's power battery (assuming that by stealing it, Larfleeze would no longer be able to power his army of constructs). Unfortunately, it's explained that Larfleeze has been in contact with the orange battery for so long that it's as much a part of him as the main power battery in Oa is a part of the Guardians.
Jordan is able to subdue Larfleeze by finally gaining control over his blue power ring. The Guardians realize that if they take the battery from Larfleeze, someone else would inevitably find it, becoming a new Agent Orange. Preferring to know where Agent Orange was, they decide to negotiate with Larfleeze once more. The details of the negotiation aren't fully revealed to the reader, however it is shown that Larfleeze asked the Guardians where he could find a blue power ring. The issue ends with Larfleeze launching an assault on the Blue Lantern Corps, sending a group of his Orange Lantern constructs to Odym. Though Larfleeze remains on Okaara (observing the progress of the conflict through his power battery), he sends a construct of himself to accompany his Orange Lanterns.
As the battle rages on in Odym, however, a swarm of Black Lantern Rings fly into his palace and latch into the corpses of all the victims he had accrued over the years. While at first he is overjoyed at the concept of a new ring he could hold, he soon became horrified at the power of the Black Lanterns, and tried unsuccessfully to destroy them until Atrocitus of the Red Lantern Corps managed to reach him, demanding he surrender the Orange Lantern Power Battery. Larfleeze is saved by the intervention of Saint Walker, Hal Jordan, Carol Ferris, Indigo-1, and Sinestro, who convince both of them to join to face the Black Lanterns. Larfleeze greedily demands the group for his cooperation if they give him what he wants, such as his own Guardian in which Sayd promises that when the battle is done, she will become one for him, despite the objections of her fellow Guardian Ganthet; and a planet-sized buffet, all for him, to placate his intense hunger. His demands greatly annoys Atrocitus and Sinestro, in which the former wants to kill him and that the latter approves as Larfleeze's ring will go to another bearer which they could find and locate its owner. However, Indigo-1 defends Larfleeze, stating that he is not inherently evil and that his hunger is merely a side effect of the orange light. Saint Walker approaches Larfleeze, telling him that his attack on Odym is forgiven and that as long as Saint Walker is near, the blue ring will keep Larfleeze's hunger at bay. Larfleeze finally relinquishes and accompanies the group to Ryut and Earth in a failed attempt to destroy the Black Lantern Central Power Battery. During the assault, he attempted to consume the Black Lantern Guardian Scar as his own, but she managed to gain the upper hand, which forced the other members of the group to destroy her. After the mastermind behind the Blackest Night, Nekron turns all the resurrected heroes into Black Lanterns, Ganthet initializes a program in Hal's ring which duplicates the ring and welcomes Ganthet into the Green Lantern Corps. His last act as Guardian was to initialize the same program in the rings of the other Lanterns. Larfleeze's ring duplicated and went to Lex Luthor, who was consumed by the power of the orange light and started attacking the Lanterns, demanding their rings, but Larfleeze doesn't want to share the power and attacks Luthor. After defeating Luthor for control of the Orange Lanterns he handed him over and received his Guardian as promised. Larfleeze later finds and assaults Lex Luthor, asking him what humans value most, to which Lex responds that the most valuable possession is land.
On Christmas day, Larfleeze eagerly awaits a visit from Santa Claus. When Santa doesn't arrive, Larfleeze goes on a rampage. He is accosted by Hal Jordan, who teaches him that the true spirit of Christmas is about giving, not receiving. Larfleeze was dismayed by this revelation. He reveals that the last and most important item on his exceedingly long Christmas list was his parents.
Larfleeze is currently in Las Vegas, asking for the whereabouts of Lex Luthor.
Obsessive Avarice: Larfleeze is completely consumed by his greed, making him paranoid and fearful of...well, everyone.
Insatiable Hunger: As a side effect of the Orange Light, Larfleeze is overwhelmed by an almost insatiable hunger, forcing him to constantly crave for large quantities of food.