Ethan Roark Jr.

"Do you think I'm tired? You think I'm getting tired? You're the one who's gonna crack! You'll crack! You'll cry and beg! You'll Scream! Oh, yeah, you'll scream, you big, fat, ugly cow! You'll scream!"

- Roark while whipping Nancy.

Ethan Roark (Roark Jr.), also known as The Yellow Bastard, is the main antagonist of the 2005 film Sin City.

He was portrayed by Nick Stahl in the film.

Background
Roark Junior, son of the corrupt Senator Roark and nephew of the fanatically religious Cardinal Roark, is a sadistic, pedophile serial rapist whose main hobby is raping and murdering pre-pubescent girls. His father uses his extensive wealth and connections to let Junior get away with these atrocities.

Sin City
The story starts with Roark Junior kidnapping his fourth intended victim, 11-year old Nancy Callahan. Detective John Hartigan, the hero of the story and the only good cop in Sin City, pursues Junior, defeats his minions, saves Nancy, and shoots off Junior's ear, hand and genitals.

However, Hartigan's partner Bob turns on him and shoots him, because he knows Senator Roark would have them killed if they actually brought his son to justice. Hartigan is framed for Junior's crimes, and Senator Roark threatens to kill anyone he reveals the truth to.

Meanwhile, the injured Roark Junior undergoes extensive reconstructive surgeries to repair his body and penis, but as a side effect he becomes hideously disfigured and has bright yellow skin. He continues his horrible killing spree, murdering dozens more innocent girls while Hartigan is in prison, and visits Hartigan in jail (not revealing his identity at the time), beats him up and gives him the severed finger of one of his victims placed in the same kind of envelope Nancy had been sending letters to Hartigan.

Realizing Nancy is in danger once again, Hartigan was granted parole after eight years by openly confessing to the crimes he'd been falsely accused of and pleading for mercy at his hearing. He tracks down Nancy Callahan, who is now a stripper at a popular local bar, and is so far unharmed. When he sees the Yellow man who visited him in prison in the bar as well, Hartigan tells Nancy, who still remembers and loves him for saving her eight years ago, that she is in danger and has to come with him.

After they start driving away, the Yellow Bastard appears in a car behind them and tries to shoot them. Hartigan shoots back and hits the villain in the neck, causing him to spurt yellow blood. They stop to make sure he's dead, but find no body and decide to camp out in a nearby hotel. There, the Yellow Bastard ambushes them, ties up Hartigan with a noose and finally reveals that he is in fact Roark Junior, and is now going to finally kill Nancy after all these years, and leaves Hartigan to hang to death. However, he manages to save himself by breaking off a piece of the window and cutting the noose with it, and goes to the Roark family farm where, according to the thugs hired to dispose of his body, Junior does his "dirty work".

At the farm, as the Yellow Bastard is whipping Nancy, she realizes that he's only satisfied if he hears the screams of his victims; she refuses to scream, if only to deny Junior that satisfaction. Hartigan then finally arrives at the farmhouse, only to collapse from his injuries. Junior starts moving in on Hartigan to finish him off, but before he can make the kill Hartigan pulls out a knife and stabs the Yellow Bastard in the chest. As he gasps in shock, Hartigan tears his genitalia off with his bare hands before viciously beating his head into the ground until it's reduced to a puddle of yellow blood.

Hartigan saves Nancy and tells her to flee, saying he will find a way to expose Senator Roark. However, once she is out of sight, Hartigan kills himself so that Roark can't hurt Nancy as a form of revenge on him.

Roark Junior