Poison Ivy (Arkham)
Real name: Pamela Isley
Full name: Pamela Lillian Isley
Alter egos: Poison Ivy, Poison Ivy (New 52)
Creator: DC Comics
Alignment: Bad
First appearance: Batman: Arkham Asylum
Place of birth: Gotham City
Occupation: Botanist (formerly), Professional Criminal (formerly), Ecoterrorist (formerly)
Base: Gotham City
Gender: Female
Race: Human
Height: 5'7 • 170 cm
Weight: 115 lb • 52 kg
Eye color: Green
Hair color: Red
Superpowers: Agility, Empathy, Mind Control, Peak Human Condition, Plant Control, Reflexes, Summoning, Telepathy, Toxin and Disease Control, Toxin and Disease Resistance
Stats: intelligence 95, strength 15, speed 55, durability 70, power 100, combat 75

History:
Batman, while he searched for Warden Sharp at the Penitentiary at Arkham Asylum, came across Poison Ivy in her cell at the Green Mile. After she sensed that her plants were in pain, Ivy plead desperately with Batman to save them. Not sharing her concern, and knowing full well what kind of havoc that Ivy could wreak if she was released, Batman disregarded her plea, left her in her cell, and continued to look for the Warden. Soon after, Harley Quinn also made her way past Ivy, and Ivy begged her to let her out so that she could rescue her "babies." At first, Harley refused because Ivy wasn't on Joker's 'Party List;' however, she gave in rather quickly and unlocked the cell door, which left Ivy free to make her way over to the Botanical Gardens. After he discovered Joker's Secret Lab in Botanical Gardens, Batman went to Ivy, whose plants had been used to help create the venom. Ivy refused to help at first, and decided instead to let the Joker "have his fun," but eventually agreed after Batman threatened to destroy her plants if she didn't cooperate. Ivy then told Batman that the spores that were needed to create the anti-venom were produced by a plant that was located deep in Killer Croc's Lair. Before he left, Batman instructed Ivy to return to her cell or he'd be back, to which Ivy replied that she'd be waiting for him. The Joker then subsequently injected Ivy with the Titan Formula. Instead of creating a "monster plant" as the Joker expected, Ivy remained the same on the outside (although with glowing green irises) but gained an enhancement to her chlorokinetic abilities, induced rapid growth and evolution among her plants, and even among the newly mutated plants were a species that produced glowing airborne toxic spores (though it should be noted that Batman said that Ivy used a similar species of plants during an attack on Gotham City a year ago). Ivy took the opportunity to take over the entire island with her newly mutated plants, vowed to kill Batman and eventually, the Joker himself, much to his delight; and looked forward to the coming battle. Batman eventually returned to the Gardens with the anti-venom formula, where Ivy beckoned Batman to come to her lair. Along the way, Batman was attacked by two security guards who were under Ivy's control, and was forced to defeat them both. Batman attempted to inject Ivy's Plants with the anti-venom before he was stopped by an attacking Ivy, who forced him to contend with more Arkham Guards who were infected by her mind-controlling plant spores, including William North and Eddie Burlow. The two engaged in a long and strenuous fight, which resulted in Ivy's defeat. After the Joker's defeat, Ivy was taken back to her cell by the Arkham Staff.

Powers:
Semi-mystical connection to the plant world through a force called the Green. In some adaptations she can control plants with her mind. For example, in Arkham Asylum: Living Hell she was able to manipulate and animate plants, using roots to form supports for a tunnel she and another inmate named Magpie were digging to escape, and also spawning glowing fungi to entertain Magpie. She controls an entire tree to come down on Clayface, ensnaring him in its branches.