|Hey, aren't you that plant lady, Poison Oaky?|
The depicted subject bears the likeness of Mr. Element from the DC Comics; however, the DCAU character was never named on-screen, or otherwise. The title of this article is conjecture based on the character's likeness. In the comics, Mister Element was Albert Desmond. He used gadgets based on the chemical elements to commit crimes. He eventually became Dr. Alchemy after receiving transmutation powers from the Philosopher's Stone.