Piper Chapman (Taylor Schilling)
Backstory: WASP poster child Piper rebels against her upright upbringing in the worst way possible: by dating drug smuggler Alex Vause, carrying dirty money across borders, and landing in jail 10 years later because her former lover ratted her out.
Place in Litchfield's hierarchy: Piper never quite finds her tribe in the pokey, either alienating people with her cluelessness (see: being starved out by Red), or choosing to be a loner. Still, by the end of Season Two, she’s at least respected; we're guessing pummeling Pennsatucky to a bloody pulp may have had something to do with that.
Pre-OITNB: Schilling had one season on the short-lived NBC drama Mercy under her belt, along with some minor film roles (including one in that recent, ill-advised adaptation of Ayn Rand's Atlas Shrugged ).
Best line: "I am a lone wolf, Brook. And a vicious one. Don't make me rip your throat out with my teeth."