Pamela Lillian Isley (also known as Poison Ivy), is an enemy of Batman and a former botanist. Due to her special affinity for all plant life, her specialty is eco-terrorism. She is always pictured with flowing red hair and a green plant-like outfit. Her only human companion seems to be Harley Quinn.
It is believed that she feels for Harley, who is mistreated by the Joker. Poison Ivy is immune to toxins and uses this ability to her advantage against her enemies. In the 1997 superhero film, Batman & Robin, Poison Ivy teams up with Bane and Mr. Freeze.