He's joined The Hero to save the day. If The Hero appealed for a group of characters to join him (a group of which he was likely the oldest or the leader, or both), he argued against it and was the last to join, but he did, and he will work quite hard, perhaps more than anyone else on the team. He is likely to be one of the most skilled and useful members and may even overlap with the Cynical Mentor. He may even make a Heroic Sacrifice.
But if so, he will regard it as Senseless Sacrifice. The Grumpy Bear that he is, he makes no bones about considering The Hero's plan futile, and may join only because his friends are, and anything else is also futile. Possibly even only because it's his only way to avoid Dying Alone. Often the oldest member of the group, and prone to Silly Rabbit, Idealism Is for Kids!. (Though not often so gloomy as to be The Eeyore.) When it dawns on him that victory is possible, an attack of Hope Is Scary is not uncommon.
In lulls in the action, he may explicitly observe that they are all going to die. Indeed, he may be the Sarcastic Devotee, though he is capable of making this observation only once or twice, or not at all.
In very hard cases, tragically, he may decide that the effort is not worth it and leave. He may even encounter the villain and have a Face–Heel Turn, but this is uncommon. Usually he's no worse than the "Disney Anti Hero".
Contrast Divided We Fall. May contrast with Least Is First as his Foil, but more often is a foil for The Hero, who will likely tell him that Silly Rabbit, Cynicism Is for Losers! when he gets heavy on the sour. Compare with The Resenter, who actively resents the hero, and with Determined Defeatist, in which it's the hero who has a bad attitude about the odds of success. Often overlaps with be a Knight In Sour Armor.
- Sailor Moon has Sailor Uranus and Sailor Neptune. Unfortunately (fortunately?) for them, the SM-verse is a real Sugar Bowl at times, and everything really can be set right with The Power of Love, so really, their sourness just makes them look Wangsty sometimes.
- Sawamura in Wa Ga Na Wa Umishi is a textbook example. It's a mystery why he still works for Nanba Salvage, given his proven world-class skills and obvious disdain for Rintarou.
- Inchiki, from the first Menchi-Centric episode of Excel Saga, appears to be this. We later learn that he is actually The Mole.
- Kai Shiden from Mobile Suit Gundam, specially before his Character Development.
- Serpico as a part of Guts' new entourage in Berserk. He's the most cynical person in the group next to Guts himself, but he's wrapped in a sarcastic layer of goodness that prevents him from deserting the group, primarily for his half-sister Farnese's sake, but it goes without saying that he does care for his other companions.
- While Tim started out as a rather idealistic Robin after almost everyone he loves died, Bruce pulled a couple of rather heartless manipulation attempts on him, and three out of four of his adoptive siblings either try to kill him or frame him for murder he becomes incredibly cynical, stating that when he was forced to hear the anit-life equation in the moments while he still retained his sense of self he found he agreed with it but tried to fight its control because he'd made oaths when he took on the Robin mantle. His cynicism was starting to lighten up after Kon, Stephanie, and Bart came back and gave him some actual support but then Flashpoint happened and erased that version of Tim.
- Peace Forged in Fire: Discussed. Morgan is a more traditionalist Romulan than D'trel, a Unificationist, and tells Praetor Velal of the Romulan Star Empire that she thinks that Proconsul D'Tan of the Romulan Republic is a "naive idealist" and says she doesn't agree with his politics. But she follows him because whatever his faults, he's sincerely trying to help, while the Empire was useless after Hobus and the Tal'Shiar caused it.
- In Pokémon Reset Bloodlines, Ash's Pokedex is quite fond of mocking Ash and will complain about him immensely. He also genuinely wants to help Ash with his information.
- Star Wars: Han Solo is this to the very end.
- Warlock from Live Free or Die Hard.
- McCoy from Star Trek is this, particularly towards Kirk. He's known to be a grouch and Deadpan Snarker, but he's loyal to Kirk, sneaking him aboard the Enterprise and arguing with Spock after the latter had marooned Kirk on an icy planet.
- Sucker Punch plays with this in the character of Sweet Pea. She plays the part of Sour Supporter perfectly, even going so far as to Opt Out at one point. The trope play comes in when she rejoins the team and ends up the only survivor by way of the rest of the team's Heroic Sacrifices, which "redeems" her of her sourness.
- In the film 1776 (and musical, both of which are Truth in Television to some extent), John Dickinson refuses to sign the Declaration of Independence, instead choosing to join the militia and fight for independence even though he believes the effort will fail.
- In Captain America: The First Avenger, Colonel Phillips is this to Steve. He was rooting for Hodge to be the first super soldier, but Steve is the only one in the squad to jump on the dummy grenade he throws:
"He's still skinny."
- It goes un-commented on in the film, but Peggy Carter also runs toward the grenade. Steve is just closer.
- In Sandy Mitchell's Ciaphas Cain novel Death Or Glory, when discussing difficulties getting through a mountain range, the guide Sandy Kolfax says it hardly matters since they will all die before they get there, and later Cain catches him drinking and he professes that it does not matter, as they will all die. But he does lead them. To the mountains, even. Where he dies.
- In Graham McNeill's Warhammer 40,000 Ultramarines novel Dead Sky Black Sun, when Uriel urges a group of Space Marines and two Imperial Guardsmen to help him, Vaanes, the leader of the group, was the last to agree, with the observation that he knew Uriel would be trouble. After they leave, he carefully ensures that Uriel knows they could all die. He finally decides that Uriel's plans can not work and that honour is not good enough to die for.
- C. S. Lewis's Chronicles of Narnia
- In The Silver Chair, Puddleglum professes, every step of the way, that they are certainly doomed to failure and death. His notion of cheering the children up is to tell them that they don't have to worry about something because they are likely to die first. Puddleglum is also said to be unusually optimistic and cheerful for a Marshwiggle - just imagine what the others would be like!
- In Prince Caspian, Trumpkin argues against sending someone to look for Peter, Susan, Edmund, and Lucy, but when the decision goes against him, volunteers to go, because he has given his advice and now he must take orders.
- Harry Potter:
"I don't think Expelliarmus is exactly going to help us against You-Know-Who."
- In Order Of The Phoenix, Zacharias Smith, while a member of the DA, seems never to speak unless he is berating Harry's methods. Continues even after this supreme put-down:
"I used it against him; it saved my life last summer."
- Deathly Hallows: Aberforth Dumbledore is almost the complete opposite of his brother. At one point, he basically says that Voldemort's already won and anyone who thinks otherwise is kidding themselves. It doesn't stop him from coming to the trio's aid when they need it, offering his pub as a meeting place for the Order, and courageously fighting in and surviving the Battle of Hogwarts.
- Many of Rand Al Thor's supporters in The Wheel of Time behave like this. The man is the Chosen One (of several prophecies and groups) but none of his disparate groups of supporters trust the other ones, and many regard him as nothing more than a loaded cannon they need to further their own ends while regarding him as an idiot who messes everything up that they need to step carefully around. To be fair Rand is pretty insane by this point, and can act idiotically, but he is a lot more competent than they give him credit for and were it not for the prevalence of this trope he would have managed to do a lot more by now. Interestingly enough, Rand actually tries to play the groups against each other in order to get rid of some people that are hindering him. Its a safe bet that at least one of them will bite the dust but Namely High Lord Wieramon. It never works.
- Grantaire in Les Misérables doesn't think much of Enjolras' revolution, but goes along with it anyway.
- In C. S. Lewis's That Hideous Strength, the skeptic MacPhee is a valued member of the good guys' team, with the observation that he would be invaluable if they lost — but they don't know what he'll do if they win.
- In Edgar Rice Burroughs's The Master Mind of Mars, Gor Hajus laughs at the quest Ulysses Paxton proposes, after rousing him from a Faux Death; if he supports him until it's done, it will be forever. He still helps him, however, since even that's better than the Faux Death.
- In John Barnes's One for the Morning Glory, they hear a ballad that ends with a young woman prisoner to the goblins, and since it's true, and they know it, they discuss rescuing her. Gorlias is as enthusiastic as any, and characters object: he's the oldest, he should be gravely warning them against it and talking of its dangers. Gorlias proceeds to discuss its dangers in a portentous tone, as if he had warned them off, but on the trip itself, he's perfectly cheerful.
- Marco from Animorphs was this at first.
- In G. K. Chesterton's The Man Who Was Thursday, the Professor gravely explains the difference between himself and Syme: Syme thinks that what he proposes to do is possible, he knows it's impossible, and will nevertheless try to do it.
- In Noob Omega Zell is technically this for the feminist cause in general. He's The One Guy at his workplace and does his part in its feminist association to cover up what he really thinks about women. When he gets online, his female guildmates get an earfull of his real thoughts.
- In Those That Wake, Mike is this. He thinks the world sucks, he's worthless, and he probably can't do anything to change it, but he'll fight anyway.
- Lovable Coward Rincewind in the Discworld novels can be like this. Most obvious in Interesting Times, where he's quite clear that the Silver Horde are doomed, the Red Army are powerless, and the only reason he hasn't run away from the whole situation is that he's run out of places to run to. Twoflower cheerfully tells everyone that he always talks like that, and he always comes through, but Rincewind still insists that he's never wanted to.
- Uhtred in The Saxon Stories is a particularly reluctant example. He expects — and hopes — that the Danes will win their war against Wessex, but has unfortunately found himself sworn to serve King Alfred, a man who he hates for both his religion and his personality — but ultimately, over the course of years, comes to respect.
"I had not liked him. I had struggled against him and for him, I had cursed him and thanked him, despised him and admired him... He was my king and all that I now have I owe to him. The food that I eat, the hall where I live and the swords of my men, all started with Alfred, who hated me at times, loved me at times, and was generous with me. He was a gold-giver."
- The Unknown Soldier: Corporal Lahtinen is a Communist conscripted to fight against the Soviet Union on the side of a quasi-fascist Finland in alliance with the Nazi Germany. He's not happy about it, as he never lets the other characters forget. However, he's also one of the most reliable and loyal fighters in the company, and even pulls off a You Shall Not Pass! Dying Moment of Awesome to hold back the charging Soviets to buy time for the retreating Finns.
- Avon from Blake's 7, who later inspired similar characters like Tyr from Andromeda.
- Avon is a rare example of a Sour Supporter who's averted The Complainer Is Always Wrong at least once. He strongly argued against blowing up Star One, which turned out to cause pretty awful collateral damage for very little benefit to the rebellion, though admittedly the alien invasion didn't exactly help either.
- Bones McCoy from Star Trek: The Original Series (although he does have an idealistic streak beneath his cynical exterior).
- Jayne from Firefly often fulfills this role.
- Medical Examiner Perlmutter from Castle.
- Chiaki Tani, at first being a rebellious kid and joining the Shinkengers just so he can surpass Takeru. While he doesn't let that one bit die out, he develops more loyalty to him. This makes him being thought as The Lancer, though he later turns out to be The Smart Guy instead.
- Buffy the Vampire Slayer:
Spike: (after a less than encouraging pep talk) Well, not exactly the St. Crispins's Day Speech, was it?Giles: We few, we happy few...Spike: We band of buggered.
- Spike became a main character specifically to do this. His job in the group, besides punching things to death, is standing on the sidelines saying "Buffy, you're stupid, and we're all gonna die."
- He becomes a more enthusiastic Scoobie after falling in love with Buffy.
- Statler and Waldorf complain about every single act on The Muppet Show. And yet they have box seats for every single show. Reasons for why range from "They're theater critics!" to "We don't even know how to get out of this stupid theater box!" to simply "I guess we'll never know!"
- Both Mika Koizumi from Choudenshi Bioman and Gai Yuuki from Choujin Sentai Jetman can fit into this category
- Rembrandt Brown (and to a lesser extent, Arturo) from Sliders. Remy's outbursts are justified, as he just happened to be driving past when the vortex opened up and pulled him along on the trip.
- Ron Swanson in Parks and Recreation. He considers his government job to be a useless joke, but admires Leslie's spirit and enthusiasm, and goes all out for her - and all his acquaintances there.
- Jim Cornette in Global Force Wrestling, the original run and even more so the Anthem owned version. Jim said Jeff Jarrett was crazy for trying to start another wrestling promotion but came to shows in the corner of Bullet Club helping to sell merchandise because Jeff's a friend, Cornette feels he owes a debt to the Jarrett family and he likes Karl Anderson, Doc Gallows and Amber O'Neal. He came onto the Anthem show when asked, openly calling them suits no more knowledgeable about pro wrestling than Turner, Panda or Sinclair's, because he truly believes there should be alternative products in USA pro wrestling again. Besides this, he makes several appearances on independent circuit, often for friends (Danny Davis in Ohio Valley Wrestling, Rob Conway in various NWA members).
- Kratos from Tales of Symphonia. In more ways than one, as you eventually learn.
- Victor Niguel in Trauma Center - a rather unpleasant chap, but works hard to find a vaccine for GUILT.
- Magus in Chrono Trigger, if you let him join you.
- Sonya Shulen near the end of the first Suikoden, after a very hard boss fight against her. If you allow her to join, she repeatedly states that she does so in order to get the pleasure of seeing you die.
- Though after the final war, if you DO ever speak to her, it sounds like she got better and sees you in a more positive way.
- Also Flik. He's at first REALLY pissed that you got his lover Odessa killed. But he joins you anyway, and his mindset is like "Let's see if you're worthy of replacing Odessa." It wasn't until Gremio's tragic death that he starts letting off with you and eventually develops further until he's the series' Ensemble Dark Horse.
- Archer from Fate/stay night; you get the feeling he only helps Shirou because his contract with Rin forces him to. As "Unlimited Blade Works" reveals, this is both utterly true but also an extreme simplification of Archer's true motives.
- Cid in Final Fantasy VII joins the party only because you took and crashed his plane and constantly complains about the other party members. However, he does end up commanding the Highwind airship crew for the player and even is promoted to party leader at one point.
- He does undergo Character Development to become a Jerk with a Heart of Gold. Plus he has awesome theme music.
- He calls the party numbskulls, but states that he likes the idea of fighting Shinra. That, and that he doesn't see a reason to hang around Rocket Town anymore, are the only reasons he joins.
- Xan, the clinically depressed enchanter in Baldur's Gate. He is very vocal about how your quest is futile, but he helps you anyway, presumably because he sees everything else in the world as equally pointless.
- Nick in Left 4 Dead 2 fits this trope to a T. He sees Coach as a foolishly optimistic and finds Ellis so incredibly naive and stupid that he won't care if Ellis gets left behind. He also constantly complains about everything, between mud from the swamps and flooding from a storm. Despite all this, Nick stays with the group because being alone would get him killed by the zombies.
- Morrigan from Dragon Age: Origins, and Shale the DLC character.
- Any companion with enough rivalry in Dragon Age II. Some will consistently begrudge the player's support of mages or Templars, and Isabella won't believe she returned The Artifact she originally stole.
- Clive Handforth from LittleBigPlanet 2.
- Subject 16 in Assassin's Creed: Revelations. He's rude to Desmond, borderline mocks Lucy's death and seems to be plotting some sort of Grand Theft Me. And then he pulls a Heroic Sacrifice and saves Desmond from deletion.
- The second one is somewhat justified in that Clay knew that Lucy was actually a Templar agent all along.
- Also, Lucy is the one essentially responsible for his shattered mind and his suicide, so really, he was far more respectful than he had any right to be. Still a sourpuss about the other stuff, though to be absolutely fair, being dead and crazy is enough to make anyone a little bit cranky.
- The second one is somewhat justified in that Clay knew that Lucy was actually a Templar agent all along.
- The Star Fox team's second Ace Pilot, Falco Lombardi, doesn't think too highly of Fox and is Only in It for the Money.
- Planescape: Torment features a Baatzu (a race of Lawful Evil demons) who was bound into a lifetime of good deeds by the angel Trias, to last until the angel's death. As such, he has to do everything he can to accommodate the Nameless One when he shows up on his doorstep, but he's more than happy to let him know that sure as hell isn't going to enjoy it.
- Amarant in Final Fantasy IX joins Zidane's party after being defeated by him, but he is absolutely puzzled as to why Zidane wastes so much energy sticking with his friends when Amarant believes the strong works alone and how people could get things done if they just did it themselves instead of relying on others. At one point, he ditches the party after beating Zidane in a race to see who could reach a specific room in a castle first, but after falling into a trap, Zidane runs back to save him, causing Amarant to rethink his logic after seeing Zidane had gone out of their way to save him just because he needed help.
- Lugo and Adams are both this to Walker in Spec Ops: The Line, to varying degrees as the game goes on and the worse things get. Adams gets so bitter about the whole situation after Lugo's death that he says things like "Yeah, I'm taking my sweet time, deal with it!" or "You wanted him dead, you should've done it yourself!" when he disengages, and come the end of chapter 14, he completely stops obeying Walker and even shoves him off when he drops his weapon with the intention of being taken prisoner into Konrad's tower.
- Rocky the rogue from Our Little Adventure didn't really want to join the group, but he frequently does give them his best.
- Karkat from Homestuck shows no respect for anyone, insults everyone he meets, gripes a lot and has grown grimly accustomed to disaster at every turn, but is near-religiously devoted to the good of his group and, after some early false starts, the human kids too, even if there are times he clearly wants to strangle them.
- Pato, from M9 Girls! is not always fond of the other girls' decisions, ranging from being treated with cosmic radiation to Karla's choice of costumes.
- In Girl Genius Moloch von Zinzer epitomizes this trope. He frequently and vocally professes a dislike of all things Sparky and constantly says he will leave at the first opportunity...and yet he never does and has helped save the day more than once with his non-sparky mechanical skills
- In Godslave, Sobek is loped into helping Heru and seems incredibly unhappy about the arrangement, to the point of aiding Anpu behind Heru's back. Even then, he clearly states that he doesn't like Anpu and is very sour about "having" to aid him.
- Kirby from The Brave Little Toaster certainly didn't keep his objections to himself when the group set out to find the master.
"I just know I'm gonna regret this..."
- Gwen Tennyson in the original Ben 10 series was this mixed with Sarcastic Devotee towards her cousin's Idiot Hero tendencies, with their interactions mostly being arguments and insults toward each other interspersed with regular Thicker Than Water moments. Future installments remove this aspect as both characters matured.
- Avatar: The Last Airbender:
- Sokka is cynical, started out thinking Aang could be a Fire Nation spy, and initially objected to going on this journey, but by the end of the series, through Character Development, he becomes a great leader and warrior. Lampshaded at one point when Sokka complains that apparently the rest of the team has decided he is the "Plan Guy" and he always has to be the one to come up with something to save the day. Toph points out that he's also "the Complaining Guy", but Sokka says he is actually OK with filling that role.
- Katara also becomes this at the start of the second half of Book 3 when Zuko joins the Gaang; understandably, she's not happy since he's tried to capture and/or kill them for a while and betrayed Aang and Katara the one time she let her guard down. She makes it vocal that she isn't happy Zuko is there (even when he saves them from Azula) and it's only when Zuko aids her in finding her mother's killer that she finally trusts him.
- Stork from Storm Hawks. He's very cynical, but has a calm acceptance of everything that happens.
- Rattrap from Beast Wars is cynical, sarcastic, complains about every plan, responds to every negative turn of events with "We're All Gonna Die", and starts out incredibly reluctant to put his life on the line. Nevertheless, he's never seriously considered abandoning his friends, even jumping into the fray to try and rescue even Dinobot.
- Lance of Sym-Bionic Titan often falls victim to a two to one vote.
"How is it that everyone agrees with me, but we're still doing this?"
- Specifically, in Under The Three Moons after saying he doesn't want to go to the school dance, Ilana and Octus make him go anyway. The same thing happened in the matter of whether he brought a date or not.
- In A Family Crisis, after the trio get a distress call from Soloman, Lance brushes it off and asks for more cake. Ilana and Octus, however, think they should save him anyway even though they agree with Lance that Soloman's a jerk and doesn't deserve saving.
- In the first few episodes of Recess, Vince was this. This faded, and was given to Spinelli on a few occasions.