Pete McVries. He once had a romantic relationship with a girl that fell apart due to financial differences between the two and this is the reason he signed up for the Walk in the first place. Pearson even wonders how badly McVries wants to die.
Pearson: Jesus, what do you think? He oughta be wearing a 'BEAT ME HARD' sign. I wonder what he's trying to make up for?
Garraty becomes one by the very end. He's so mentally and physically worn-down by that point that he only wants to keep walking, and thinks his prize will be his own death. A dark figure then appears to guide him on, who may or may not be The Grim Reaper.
Determinator: What you have to be to even make it to the halfway point, let alone win. A particularly gruesome example is Hank Olson, who makes it just past the halfway point entirely on sheer force of will as both his body and his mind had completely broken down by then. He even gets shot through the gut and that doesn't immediately faze him.
Disappeared Dad: Garraty's dad had negative views against the government and was very vocal about it, going so far as to take Garraty to see a Long Walk when he was younger so that Garraty could see how horrible it was. He was ultimately "Squaded," slang for being taken away by the Squads and possibly Released to Elsewhere.
Face Death with Dignity: Scramm, knowing full well he can't finish the Walk with such an advanced case of pneumonia, and Mike, one of two Hopi brothers who gets struck with severe abdominal cramping. Instead of just falling over and taking it, Scramm says his goodbyes, talks with Mike who bids goodbye to his brother, and walks into the escorting half-track's path. They flip the half-track off, insult the soldiers approaching them and sit down to talk while they wait for death.
Get A Hold Of Yourself Man: When Garraty experiences a fit of laughing madness and incurs three Warnings during said fit, McVries intervenes, holding Garraty up to keep him going so he doesn't get a ticket and attempting to verbally coax him out of it. Eventually, McVries slaps Garraty to get him to snap out of it before he gets his ticket, getting himself a Warning in the process of this act.
Go Out with a Smile: Pete McVries When he feels he can't go on for much longer, he sits down in the road and smiles at Garraty as he is shot by the soldiers.
Heroic Vow: Once word gets out among the Walkers that Scramm has a pregnant wife after Scramm himself is going to die, they make an agreement that whoever wins the walk will help his newly made widow.
Jerkass: Gary Barkovitch. Not only does he manage to make enemies out of most of the other Walkers, but he even manages to goad an already-enraged and violent Rank to exhaust himself, resulting in his elimination.
Kill 'em All: Every contestant save for Ray Garraty dies during the Walk, and it looks he won't have long to live either, even though he won. It's mentioned earlier in the story that most of the previous Walks' winners died not long after due to the immense physical and psychological strain it placed on them.
Never a Self-Made Woman: The only girls and women who are mentioned (especially by name) or appear in the plot action are girlfriends and family members of the Walkers, who are all male. Justified, though, because The Long Walk only allows male teenagers to compete and the plot is basically the events of the Walk.
Garraty: God's garden? What about God's garden, Olson?
Olson: It's full. Of. Weeds.
Olson: I don't. Want. To die.
Pyrrhic Victory: Garraty is the Pyrrhic Victor of the eponymous Long Walk by virtue of having outwalked 99 other male teenagers. However, he's also watched most of them die, including those he had established a rapport with, and is at the point where his physical and mental health have greatly deteriorated and he welcomes the prospect of his own death.
Raging Stiffie: Gribble, who feels up a young woman watching the walk. The sexual frustration is enough to slow him down sufficiently to incur his ticket.
Rasputinian Death: Olson. He is first shot in the belly, then he gets up and continues walking. Then he is shot a couple more times in his belly, causing his intestines to visibly spill out and he is still walking through this. Eventually, the soldiers put two more bullets in him and take him away.
Released to Elsewhere: At the beginning of the book, all the reader knows is that if a Walker commits any offense, then they get a Warning and if he commits one more when he's already got three Warnings accumulated, he "buys a ticket." It then turns out that "buying a ticket" is a euphemism for being shot dead by the soldiers on the escorting halftrack.
Sanity Slippage: Practically everyone suffers from this at some point. Or at least, those who survive long enough do.
Suicide Attack: Hank Olson and Collie Parker both try to overtake one of the escort half-tracks by force. Both of them fail, but while Parker got off light, Olson was made an example of.
Someone to Remember Him By: No one featured directly in the plot gets pregnant with or is one of these babies, but Scramm has a wife who is pregnant with his baby and with his death has made the baby an example of this trope.
There Can Be Only One: There is no set distance for the Walk. It just goes on until there is only one survivor.
Too Dumb to Live: A walker who dies early on was wearing sneakers, despite the rulebook that the contestants were given in advance explicitly telling them not to do so, as no other type of footwear will help develop blisters faster on long distances. Predictably, he develops blisters pretty soon, and is ticketed after walking at the required speed becomes too painful for him one time too many. Garraty even discusses it in his internal monologue.
"Well Done, Son" Guy: Stebbins reveals that he is the illegitimate son of the Major and therefore, he only expects his "Prize" to be for him to "be taken into [his] father's house" and acknowledged as the Major's son.