In "Legion," Aubrey Plaza plays Lenny, who was introduced as a troubled young woman with substance abuse and mental health issues. When she debuted, she appeared as a friend of the lead character David Haller (Dan Stevens), but -- since he also has substance abuse and mental health issues -- it is sometimes difficult for the audience to tell how real Lenny is, especially since she was seemingly killed in the show's first episode.

In a recent interview with Conan O'Brien, Plaza confirmed that her role on the show is even stranger than it first appears when she shared the fact that “in the pilot script, [the part] was written for a middle-aged man.”

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Plaza further revealed that she never auditioned for the role of Lenny. When she met with showrunner Noah Hawley, he offered her the part, despite the fact (or possibly because) she was hobbling about on crutches after damaging her anterior cruciate ligament.

However, while landing the part might have been simple for the "Parks and Recreation" star, describing her character proved more of a challenge. "It’s really complicated and its hard to explain,” Plaza said. "It’s one of those shows, its really... very trippy and kind of hard to talk about, but yeah, I am many things and an old man is one of them."

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Of course, recent episodes of the show have strongly implied that Lenny might also be a manifestation of something far worse and far more powerful than David's drug buddy and fellow mental health patient. She could very well be the Shadow King, a bodiless malevolent entity who was introduced in "Uncanny X-Man" #117 as a mutant named Amahl Farouk.

Starring Dan Stevens, Aubrey Plaza, Katie Aselton, Jeremie Harris, Bill Irwin, Rachel Keller and Amber Midthunder, “Legion” airs Wednesday evenings at 10PM on FX.