Ivy Pepper

Ivy Pepper is a character in the television series Gotham, in which she appears as a recurring character during the first and second season, and then as a regular for third season in which she will also act as the antagonist. She was originally played by Clare Foley during season 1 and 2, before the role was taken over by Maggie Geha for season 3. She is the series' version of the Batman supervillain Poison Ivy and acts as a re-telling/origin to the character prior to Batman's arrival in Gotham City.

Ivy is introduced in the first episode "Pilot" as the daughter of Mario Pepper who is set up for the Wayne murders. She becomes homeless and befriends another homeless girl Selina Kyle. At the beginning of season 3, a 14-year old Ivy is attacked by one of Fish Mooney's henchmen who has the ability to age his victims, thus aging her to a 19-year old woman.

History
Ivy Pepper was orphaned after her father Mario got set up for the murders of Thomas and Martha Wayne, and her mother subsequently committed suicide after his death. Ivy ran away from her foster family and went to live on the streets, where she befriended Selina Kyle and the pair of them stayed at the apartment of Barbara Kean for a short while.

Ivy got involved with the Gilzean crime family growing magic mushrooms.

Transformation into womanhood
Ivy got confronted by a look-alike of young billionaire Bruce Wayne, who had an unkempt appearance, long hair and acted strangely. When he confronted her begging to know who Bruce is, she got spooked and ran. She came across a hideout of supervillain Fish Mooney and her army of monsters and that Selina was also present and working for them. Despite Selina trying to speak up for Ivy, Ivy didn't help the situation by threatening to tell on Fish and her monsters due to them being wanted. Fish ordered one of her underlings Marv to use his ability to age Ivy to death. She broke free and got chased down, before coming to a hole in the ground leading to a drain. Selina tried to help Ivy but got held back by one of the monsters, and Marv snuck up on Ivy and grabbed her. He held onto her for a brief second before she broke free but fell down the drain and got swept away, much to the distress of Selina who believer he friend had been killed.

Ivy survived the confrontation and crawled out of a river, but discovered that she has aged into her late teens. She is taken in by a man named Nick who wants to help her, and offers her water. She takes a drink before dumping it on one of his plants. She is displeased that he chucked out one of his plants. Later that night she dresses in one of the clothes of Nick's ex-wife. She leaves the house and is revealed she has killed Nick in retaliation for him dumping one of the plants.

Season 1

 * "Pilot"
 * "Lovecraft"
 * "Rogues' Gallery"
 * "Welcome Back, Jim Gordon"
 * "The Blind Fortune Teller"
 * "Red Hood"

Season 2

 * "Rise of the Villains: By Fire"
 * "Wrath of the Villains: Mad Grey Dawn"
 * "Wrath of the Villains: A Legion of Horribles"

Season 3

 * "Mad City: Better to Reign in Hell…"
 * "Mad City: Burn the Witch..."