What quotes represent Roger in Lord of the Flies?

In William Golding's allegory, Roger represents sadism. When he is first introduced to readers, he "kept to himself with an inner intensity of avoidance and secrecy."  The first depiction of Roger comes in Chapter Four when he stoops and picks up a stone, "that token of preposterous time" and bounces it a few yards from the littl'un Henry who sits on the shore:

Here, invisible yet strong, was the taboo of the old life.  Round the squatting child was the protection of parents and school and policemen and the law.  Roger's arm was conditioned by a civilization that knew nothing of him and was in ruins.

When Jack approaches him, Roger sees him, "a darker shadow crept beneath the swarthiness of his skin...."

In Chapter Seven, Jack decides to hunt for a pig and taunts Ralph into accompanying him. When Robert pretends to be the pig, Rogers fights to get close.  Later, too, Roger becomes a shadowy presence:

Roger, uncommunicative by nature, said nothing.  He offered no opinion on the beast nor told Ralph why he had chosen to come on this mad expedition.  He simply sat and rocked the trunk gently....Roger was banging his silly wooden stick against something....impervious Roger....

Roger follows Ralph and "lay behind him"; he "bumped fumbled with a his of breath and passed onwards."

In Chapter Eight, when the hunters find a pig, Roger prods

with his spear whenever pigflesh appeared....Roger found a lodgment for his point and began to push till he was leaning with his whole weight. 

That Roger has descended into savagery is evinced in Chapter Eleven when he takes up

a small stone and flung it between the twins, aiming to miss.  They started and Same only just kept his footing.  Some source of power began to pulse in Roger's body.

Ralph tries to call a meeting and reorganize the boys, but he and Piggy are met by "the storm of sound."  High above,

High overhead, Roger, with a sense of deliriuous abandonment, leaned all his weight on the lever.

A huge rock strikes Piggy, sending him through the air where he falls forty feet and lands on his back across the square red rock in the sea.

In Chapter Twelve, Sam tells Ralph, "You don't know Roger.  He's a terror."  Then, "Roger sharpened a stick at both ends."  Clearly, the sadism given free rein, Roger becomes more and more brutal and sadistic.

In chapter 10, Roger approaches Castle Rock on his own and is stopped by a sentry. After the sentry questions and correctly identifies Roger, he allows him to pass. When the sentry comments that Jack gave them orders to challenge anyone, Roger responds by saying,

You couldn’t stop me coming if I wanted. (Golding, 228)

Roger's comment emphasizes his threatening nature and foreshadows his violent actions. Similar to Jack, Roger has an affinity for violence and is depicted as a sadist. Roger is also a relatively quiet adolescent, which contributes to his ominous, intimidating personality. By challenging the sentry, Roger also reveals that he is confident in his strength and fighting skills. The fact that Roger will not go down without a fight suggests that he could have issues with Jack in the future. In the next chapter, Roger demonstrates his violent, hostile personality by rolling a massive boulder towards Piggy, which kills him instantly.

An important quote by Roger is when he suggests that they will never be rescued, showing the dark side of his personality.

Roger is a quiet but moody boy.  The other boys are wary of him from the beginning.  No one knew him at first.  This demonstrates that he is somewhat of an outsider.  Roger does begin interjecting himself into the discussion, and usually not on a positive note.

Roger took the conch and looked round at them gloomily.

“I’ve been watching the sea. There hasn’t been the trace of a ship. Perhaps we’ll never be rescued.” (ch 2)

Roger usually does not speak, although he is usually involved in what is going on.  When he does talk, he usually says something important or tries to, and because he does not talk much the others listen.

This statement is a direct violation of Ralph’s authority, and he immediately contradicts Roger.  He sees Roger as a threat, slowly chipping away at his position.

A good quote to examine when considering Roger's character is the scene in which Roger practices throwing stones at Henry but chooses to miss:

"Here invisible, yet strong, was the taboo of the old life.  round the squatting child was the protection of parents and school and policemen and the law.  Roger's arm was conditioned by a civilization that knew nothing of him and was in ruins" (62).

This quote from Chapter Four reveals Roger's reluctance to trespass the boundaries of civilization.  This scene with Roger occurs fairly early on in the novel when the presence of law and order was still strong in the boys' minds.  It is interesting to note that the things that hold Roger's arm back, teachers, parents, school, are all exterior sources of motivation to behave correctly and do right; there is no mention of Roger's morals or conscience convicting him.  Later as the boys descend more and more into savagery, those old restraints will not be there, and Roger will have no qualms about using violence against the other boys.