Turanga Leela is the most competent of the Planet Express crew, as the ship's one-eyed captain.  Leela thinks she's an alien from another planet, but eventually learns she's just a mutant from the sewers.

Leela is voiced by Katey Segel.

Leela Quotes

Farnsworth: (on the phone) Oh, how awful. Did he at least die painlessly? To shreds, you say. Well, how is his wife holding up? To shreds, you say. Very well then. (hangs up) Sad, sad, terrible, gruesome news about my colleague, Dr. Mobutu.
Leela: Was his apartment rent-controlled?

Fry: Leela, wanna join the mile-deep club?
Leela: Sure, why not?