Poison ivy (Harley Quinn series)

Poison Ivy (aka Pamela Isley) is the deuteragonist of the DC Universe's animated Harley Quinn franchise. She is Harley Quinn's best friend, eventual girlfriend, and fellow Arkham Asylum escapee. In Season 4, Ivy became the CEO of the Legion of Doom, but she eventually realized it interfered with her real goals. She defected from the Legion of Doom and later became a member of the newly created Gotham City Sirens, which disbanded sometime before the beginning of Season 5 due to the teammates' inability to work together.