First seen in ''The Sentry #1'' (September, 2000), Robert Reynolds was an overweight, middle aged, alcoholic until one day he awakens and realizes that he is the Sentry, a superhero with the power of '''one million exploding suns''', who must once again take the mantle of the hero to fight his archnemesis the Void, whom he fears is returning soon.

This rather strange origin story begun via a hoax that was perpetuated by Creator/StanLee himself in stating that there was a golden age superhero whom he just forgot about and wanted to weave into the continuity. Through a series of recursive flashbacks Robert Reynolds is seen fighting alongside Marvel's most popular superheroes including the ComicBook/FantasticFour, the [[ComicBook/IncredibleHulk Hulk]], and ComicBook/SpiderMan, and the entirety of the Sentry's first miniseries revolves around figuring out why everyone has LaserGuidedAmnesia surrounding his existence.

His actual powers were bestowed upon him when a young Robert, while working in a physics lab, drank a serum that "moved his molecules 1 second ahead of the current timeline." It was later revealed that this was a newer version of the Super Soldier serum that transformed Captain America.

Seen as somewhat of an AlternateCompanyEquivalent of Franchise/{{Superman}} due to his [[SuperpowerLottery seemingly limitless powers]], including: energy blasts, super strength, flight, and of course a hefty dose of NewPowersAsThePlotDemands.

The Sentry, while seeming like an InvincibleHero, actually has many weaknesses due to his being AxCrazy (this is not expunged when Robert becomes the Sentry). Robert Reynolds is an agoraphobic, anxiety-ridden schizophrenic who relies on his robot sidekick CLOC to calculate the severity of problems that need his help, and solves them in order based on CLOC's input.

Despite his death at the end of Dark Reign, the Sentry was resurrected by the Apocalypse Twins' new Horsemen in ''ComicBook/UncannyAvengers'', though Thor convinces him to help stop Exitar the Executioner. Sentry, having fully succumbed to his insanity and believing himself to be the successor of Apocalypse, agreed to do so... after he rid the world of the "cancerous" mutants.

In terms of VideoGames, The Sentry was a playable character in ''VideoGame/MarvelUltimateAlliance 2'' for NintendoDS and ''Marvel VideoGame/SuperHeroSquadOnline''.


* AlliterativeName: Robert Reynolds, though he usually goes by Bob.
* AntiChrist: The Void generally functions as this. Hiroim refers to him as a "Worldbreaker", in contrast to "[[MessianicArchetype The Sakaarson]]".
* AxCrazy: As the Void.
* BackFromTheDead: While he's been resurrected several times, his most recent revival was [[spoiler:when the Apocalypse Twins revived him as one of their Four Horsemen of Death. It's not known if the Void has been revived as well.]]
** [[spoiler: It appears, going by Bob's word, the Void ''[[CompleteImmortality never died]]''. It simply got tired of being imprisoned in the sun and shuttled itself off to the White Hot Room.]]
* BadassBoast: From ''ComicBook/{{Siege}}'':
--> '''Sentry[=/=]Void''': How many gods will I have to kill today?
* BearsAreBadNews: One of the Sentry's foes was a giant bear. The Sentry couldn't defeat it, just convince it to hibernate.
* BeenThereShapedHistory: The Void may have caused [[Literature/TheBible the Plagues of Egypt]].
* BewareTheSuperman: Being powerful to such a degree is more than dangerous when also having such serious mental problems. As seen in ''Dark Reign'', he is very easily manipulated. And not to talk about what happens when the Void breaks out. Breaking literally every bone of the freakin' '''Hulk''', rampaging through New York or leveling the whole city of Asgard. And that's by far not everything that this psycho has unleashed during his life.
** After he survives being disintegrated, Bullseye wonders if, when he finally goes over the edge, they'll actually be able to kill him. [[spoiler: The answer is no, not unless he lets you.]]
* BodyHorror: When he transforms into the Void, the results are usually monstrous.
* BrainsEvilBrawnGood: Shows both sides. He's a supergenius, but usually defaults to trying to smash things or throw them into the sun.
* BroughtToYouByTheLetterS: He has an S-shaped sigil on his waist.
* BulletCatch: The Sentry once stopped an assassination attempt in this manner.
** [[http://img186.imageshack.us/img186/1586/sentry06oroboros003.jpg Catching bullets is cakewalk for the Sentry]].
* CareBearStare: The Sentry can emit a calming aura to help the Hulk manage his rage. Reed Richards tries to simulate this aura during ''ComicBook/WorldWarHulk'', but it doesn't work.
* CharacterShilling: Some of it's a consequence of him being a walking CosmicRetcon, the rest is just there for the usual reason.
* ColorCodedForYourConvenience: The Sentry's eyes glow yellow when he uses most of his powers, blue when he's using his psychic powers, and red when the Void is about to emerge.
* CombatTentacles: Part of the Void's physical makeup, the tentacles are strong enough to restrain the Hulk and break his bones.
** In ''Siege'', they ''ripped Loki in half'' (and then maybe a few more pieces).
* ConspicuousTrenchcoat: The Void's wardrobe of choice throughout ''The Sentry'' limited series.
* TheCorrupter: ComicBook/NormanOsborn, who thoroughly abuses Bob's fragile mental state. It wasn't until Osborn provided the Sentry with another dose of the serum that the Void became the dominant personality.
* CurbStompBattle: Sentry has multiple examples of being the one issuing these out. One is Sentry vs. Ares during ''Siege''.
** His "battle" against Carnage was [[http://img337.imageshack.us/img337/1381/na0214.jpg all]] [[http://img42.imageshack.us/img42/4349/na0215.jpg too]] [[http://img213.imageshack.us/img213/4310/na0216.jpg easy]].
** The fight with Attuma? [[http://a.imageshack.us/img38/4729/ts01006.jpg Even easier]].
** What about Terrax, a herald of Galactus? [[http://media.comicvine.com/uploads/2/24463/456043-sen_terrax_0_super.jpg Stopped]]. [[http://media.comicvine.com/uploads/2/24463/456045-sen_terrax_2_super.jpg Cold]].
** Iron Man? [[http://media.comicvine.com/uploads/1/14661/293722-160564-sentry.jpg Take a guess.]]
* DarkSecret: The truth behind the origin of the Sentry, kept between Bob and his wife, Lindy. [[spoiler: Bob was just a drug addict looking for a fix, not an innocent young man working in a physics lab. The Void is the manifestation of the part of him that is still that junkie.]]
* DeathIsCheap: Sentry had died and returned within the confines of a single issue, usually as a result of the Void's intervention.
%%* DemonSlaying
* DependingOnTheWriter: Sentry has something like eight different origins, and the level and type of his mental psychosis fluctuates from issue to issue. Even the Void seems to change from split personality to separate entity on alternating weekends. His level of power also goes up and down, from "stronger than Thor, but it'd still be a fair enough fight" to "could smash the entire planet into gravel with a single pushup."
* DidYouJustPunchOutCthulhu: The Sentry has supposedly defeated Galactus either on his own or with the help of [[ComicBook/XMan Nate Grey]]. Debatable given never really shown even in a flashback and the Sentry's unreliable history, but Nate's comment afterwards, when Norman Osborn implies that he was manipulating the Sentry, suggests that it might actually have happened.
* DisproportionateRetribution: Bob finds out that a yoga instructor is putting some moves on his wife; sometime later, the Sentry saves 150,000 people from a crashing boat, while the Void hurls a jet airliner into a building and kills 150,000 people. Ramón the yoga instructor was in that building.
* DrivenToSuicide: He's tried more than once.
* DrugsAreBad: Sentry tries his best to hide his drug-filled past from everyone he can.
* EldritchAbomination: The Void is hinted to be an angel of death from Biblical times.
* ElementalPowers: The Void can control the weather.
* EnemyWithout: The Void is capable of manifesting separately from the Sentry, and there have been occasions when the two have fought.
* EyeBeams: One of his myriad powers.
* {{Expy}}: His original series seems to be heavily inspired by Creator/AlanMoore's rework of ''Marvelman''/''ComicBook/{{Miracleman}}''. Both feature middle-aged guys who are vaguely haunted by their past as the most powerful person on the planet. Down to details like being jealous of their super selves, their wives being more attracted to their other selves and their origins in a secret government program. Which makes the Sentry an {{Expy}} of a reworked DarkerAndEdgier CaptainErsatz of a CaptainErsatz, as Marvelman was a British copy of [[ComicBook/{{Shazam}} Captain Marvel]], who was himself a copy of Superman. So he's like {{Superman}}'s fifth cousin twice removed.
** He's also ''very'' similar to Triumph, an extremely powerful Creator/DCComics hero who was {{Retcon}}ned into being a founding member of the JusticeLeagueOfAmerica during ''Comicbook/ZeroHour''. He even fell victim to a TimeyWimeyBall that forced his comrades to forget about his existence.
** The ''Age of The Sentry'' miniseries manages to take the Superman comparisons further. He's got the Sentress (otherwise known as ''Carol Danvers''), who's a Supergirl / Wonder Woman mash-up (the DistaffCounterpart but with a Wonder Woman-esque supporting cast), the ''ComicBook/GuardiansOfTheGalaxy'' are the ComicBook/LegionOfSuperheroes, and even some of the Sentry's unseen villains resemble Supe's.
* FallenHero: If the rest of the page is no indication.
* {{Flight}}: Duh.
* FromASingleCell: The Sentry has been blown into pieces by powerful enemies like Morgan Le Fey and the Molecule Man but his body always reconstitutes itself.
* FromNobodyToNightmare: Was a meth addict before getting his superpowers.
* HandBlast: One of his more potent ways of projecting his power.
* GroinAttack: On the receiving end of this by [[SuperHeroGods Her]][[ComicBook/TheIncredibleHercules cules]] in ''ComicBook/DarkReign''.
* HealingFactor: A pretty powerful one which puts even Wolverine and Hulk to shame.
* [[spoiler: HeroKiller: Especially in Siege.]]
* HomeBase: The Sentry has the Watchtower, while the Void has the "hidey-hole" in Antarctica.
* HumanoidAbomination: On a good day, the Sentry can rewrite reality and it's implied he's only as human as he believes himself to be. On a bad day... well, [[SuperPoweredEvilSide there's]] [[OurAngelsAreDifferent the]] [[EldritchAbomination Void]].
* HurlItIntoTheSun: After defeating the Void, Bob hurls it into the sun after giving it [[ScrewYourself a kiss]].
** Lampshaded in-comic: "I don't throw ''everything'' into the sun."
* IdealHero: ''The Sentry'' limited series reveals that the Sentry persona is actually Bob Reynolds' idealized version of himself: the handsome, invincible champion of the entire planet.
* IndecisiveDeconstruction: As time goes on, it gets increasingly hard to tell if his CharacterShilling is part of a clever commentary on the shifting nature of reality in comics or just the writers desperately trying to convince fans that Sentry's really a likable and interesting character, honest.
* InformedAttribute: The Sentry was often pushed as being the ultimate hero that aside from being the most powerful was an inspiration to everyone, their best friend, as smart as Reed Richards, and involved in nearly every major Marvel event from convincing [[IronMan Tony Stark]] to stop drinking to being the best man at [[ComicBook/FantasticFour Reed and Sue's wedding.]] Outside of stories written by his creator and maybe one or two others these attributes were never demonstrated. He never demonstrated intelligence on par with Reed or being a major inspiration or friend to anyone. The attempt to force the idea down readers' throats that he was all that yet it was never demonstrated is another reason he is despised.
* IntangibleMan: Part of the Void's power set.
* InvoluntaryShapeshifting: Bob forcibly transforms into the Void after he loses control.
* InsaneEqualsViolent: Very much so for him! Generally he's (mentally speaking) like a young child, often asking if what he did was right, so it makes sense that he would lash out when he's angry/upset.
* MadeOfIron: [[http://3.bp.blogspot.com/_39-VfFoO9u0/TNoAmZQjnAI/AAAAAAAACew/CHcpYpVx22o/s1600/sentry_thing_1.jpg The Thing throws his best punch at Sentry]]. There was probably more pain in Thing's hand than in Sentry's body.
* MercyKill: [[spoiler: A reluctant Thor puts Bob out of his misery at the end of ''Siege''.]]
* MindRape: If beating an opponent to a pulp with fists won't do the trick, Bob will resort to this. [[http://media.comicvine.com/uploads/10/101644/2033272-71222830_super.jpg He'll even make the victim see him as the Void and not the Sentry.]]
** What if a foe has Wolverine's healing factor and unbreakable bones and Luke Cage's unbreakable skin? Sentry won't even blink.
* MoodWhiplash: The Age of The Sentry issue 4 has a story about the Sentry's birthday. Typical Silver Age nonsense, with Jean Grey fawning over the Sentry's dog, and two Nick Furies in one place, and then the art changes to a more modern style, as one of the Sentry's villains arrives, with images of planets exploding behind him... phew, good thing Bob just zoned out for a minute there, folks!
* MultipleChoicePast: In truth, it is still not clear ''exactly'' what the relationship is between Bob Reynolds, the Sentry and the Void (Is the Void the real Bob Reynolds, or is the Sentry, or is neither, or are they both?), exactly what the serum was he took or even whether it actually ''did'' anything, what the exact nature and source of his powers is (I am a superhuman! I am actually the angel of Death! I am a refugee from another universe! I am Galactus!), how the Void really came into existence and whether he is really dead. This, of course, fits in very nicely with the notion that the Sentry is bugnuts insane and genuinely does not know what happened, and perhaps subconsciously even alters reality to suit whatever his psychosis says is the real story that day!
* NeckSnap: Thor snapped the Sentry's neck in a ''What If?'' centered around ''ComicBook/SecretInvasion''.
%%* TheNeedless
* NighInvulnerability: To an absolutely ''insane'' degree. He was bodily disintegrated by both Morgana leFay and Molecule Man, and simply ''re-appeared with no explanation''. When he tried to commit suicide by flying into the sun, he was already swimming in superheated solar plasma when his evil self basically said "Don't be silly, kiddo".
%%* NoHoldsBarredBeatdown
* OffWithHisHead: The Sentry killed ComicBook/SubMariner villain Attuma in this manner.
** Sentry rips the head off things quite a bit. Not just fodder opponents either. [[http://media.comicvine.com/uploads/2/24463/456049-sen_rips_u_super.jpg Even Ultron's head isn't safe from the Golden Guardian of Good]].
** And Morgan Le Fey.
* OurAngelsAreDifferent: The Void might have been around since Biblical times as the Angel of Death.
* PlayingWithFire: And what powerful fire it is.
* PowerCreepPowerSeep: In his miniseries, the Sentry actually bled after being bitten by a dog. By the time ''Siege'' rolled around, Bob was shrugging off blows from Thor's hammer without a scratch on him.
** This could be something to do with his psychosis, as his strength levels yo-yo almost as much as Gladiator's.
* PowerMakesYourHairGrow: Bob's hair is of average length, but becomes quite long when he's the Sentry. This wasn't present in the original miniseries, but was added when the Sentry was introduced the main Marvel Universe to distinguish him from other blonde heroes when unmasked. This was such a late change that the cover of New Avengers 3 [[CoversAlwaysLie has a short-haired Sentry.]]
* PowerGlows: He's not called the "Golden Guardian of Good" for nothing.
* PsychicPowers: The Sentry has shown psychic powers strong enough to give Comicbook/DoctorStrange pause. It is believed that Bob used this power to erase the entire planet's memory of the Sentry, including his own.
* PsychoSerum: The serum that gave Bob his powers was a new version of the Super Soldier serum [[UpToEleven amplified 100,000 fold]]. According to ''The Sentry'' limited series, Bob became the insane Void persona from the moment he injested the serum.
* RapidFireFisticuffs: See [[http://static.comicvine.com/uploads/original/11/110794/2411960-what_if___secret_invasion_019.jpg here]] for example.
* RedEyesTakeWarning: Sentry's pupils start to glow red when the Void is about to emerge, while the rest of his eyes turn [[BlackEyesOfCrazy pitch black]].
* {{Retcon}}: Sentry is retconed into having been an important person to many [[CharacterTitle title characters]] in the [[UsefulNotes/TheSilverAgeOfComicBooks silver age]].
* {{Retraux}}: The ''Age of The Sentry'' mini-series, focusing on the Sentry's supposed Silver Age era exploits.
* SamaritanSyndrome: A sad Deconstruction. He can't prioritize where his help is needed the most and thus often falls into despair.
* SealedBadassInACan: The Sentry was voluntarily imprisoned at the start of the ''New Avengers'' series, sporting a scraggly BeardOfSorrow.
* SexierAlterEgo: Bob's wife, Lindy, prefers sleeping with him while he's in Sentry form.
* ShapingYourAttacks: A rarer skill, the Sentry can create yellow HardLight constructs similar to ComicBook/{{Quasar}}'s quantum constructs. In a fight against Terrax, Sentry created a bubble construct to block the Herald's HandBlast.
* ShockwaveClap: One of the Sentry's attacks. He uses this one against a bunch of the Void's attack drones in ''The Sentry #8''.
** He may have picked it up from or taught it to his buddy, The ComicBook/IncredibleHulk.
* SpeechBubbles: The Void's speech bubbles are black with white lettering, the exact opposite of the Sentry's and most other characters.
%%* SpeedBlitz
* SplitPersonality: The Sentry (good) and the Void (evil). The relationship between them is described as a [[AGodAmI god complex]]: every time Sentry did something good, Void did something equally evil.
* StrongAsTheyNeedToBe: Sentry only gets stronger with time. He cannot be completely destroyed (see his immortality trope entry) and can exchange punches with Hulk and Thor. Sentry can impress even Doctor Strange, the Sorcerer Supreme, with his psychic and telepathic abilities and possesses molecular manipulation on the same level as Molecule Man. Moving faster than the speed of light is a simple matter for Sentry and he can travel distances in seconds that even the speedier characters require minutes for. The only weakness Bob has is his unstable mind but making use of this weakness is a huge gamble even for master manipulators because they risk releasing the Void.
** Sentry while either completely stable mentally or Voided out is a true monster to behold. Sentry's strength depends on his mental stability and Sentry managed to fight World War Hulk after being consumed by his agoraphobia for 29 hours, showing even a weakened Sentry is a force to be reckoned with. The Void managed to [[spoiler: rampage through Asgard and topple foes such as Thor and Ares]] in ''Siege'', and he was just getting started. When Void was not as powerful, he was still able to break every single bone in the Hulk's body.
*** Proof of this is when, as the Horseman of Death (and thereby even crazier than usual), he manages to temporarily stop Exitar, a Celestial, from descending to destroy the Earth long enough for Thor to kill him with Jarmbjorn, when Rogue, who'd taken powers from quite literally all the Avengers and all the X-Men, including the full power of Wonder Man, and a machine powered by the Hulk hadn't managed it (though she didn't stop her effort so it is not known how much either of them contributed).
* SuperReflexes: Catching bullets is quite easy for him.
* SuperSenses: Which can be a real pain factor for him, as he can't prioritize whom to save first.
* SuperSpeed: Sentry can fly to the Sun and back in seconds.
* SuperStrength: The Sentry is one of the strongest heroes in the Franchise/MarvelUniverse, capable of matching strength with the Hulk, [[ComicBook/TheMightyThor Thor]], and [[ComicBook/IncredibleHercules Hercules]]. The Void's strength is enough to break almost every bone in the Hulk's body.
* SuperheroesWearCapes: Well, he ''is'' a Superman expy....
* SuperheroesWearTights: Duh!
* SuperpoweredEvilSide: The Void
* SuperWeight: He is often said to be Level 6. He supposedly stalemated Galactus, has often been compared to ''the power of a million exploding suns'', defeated a Molecule Man without beliefs on his abilities and therefore at full power (Post-Retcon however), and was said to be a Biblical angel of death, capable of causing greater destruction than the multi-universal damage of the Scarlet Witch, but we never actually see anything concrete, beyond easily overloading the Absorbing Man, who has had no trouble copying {{Mjolnir}} in the past. As it is, he is a powerful Level 5.
* {{Teleportation}}: Has done it on occasion.
* TookALevelInBadass: The Void began taking on larger, more powerful forms leading up to ''Siege'', possibly due to the second dose of serum provided by Norman Osborn. Before, during the ''Sentry'' miniseries, the Void seemed to be limited to humanoid size at best.
** Following his becoming a Horseman of Apocalypse, he's even more of a beast than usual, quite capable of handling Thor alone and delaying a Celestial.
* UnskilledButStrong: With the Mighty Avengers, Sentry is stated outright to be the strongest member, but held back by his lack of skill.
** Hercules once hilariously exploited this weakness and [[CurbStompBattle made a complete fool of Robert]] in a very comedic [[GroinAttack and painful]] way.
--> '''Hercules''': Learn to fight like you ''mean'' it, pretty boy.
* VoluntaryShapeshifting: Unlike the Sentry, the Void can shapeshift at will, sometimes taking the form of whatever its opponents fear most.
* WillfullyWeak: Possessing incredible power, the Sentry holds back because he's afraid of losing control.
* WithGreatPowerComesGreatInsanity: A poster boy. It was suggested by characters that Sentry is addicted to his power, which stems from his past as a junkee.
* WorldOfCardboardSpeech: Gives a brief one during the events of World War Hulk. The Hulk contends that the Sentry doesn't want to fight him. The response (paraphrased): "God help me, I do...because you're the only one I can hit like ''[[MegatonPunch this]]''."
* WorldsStrongestMan: The Sentry is without question a heavy contender for this title and Marvel has no problem with making characters say so. [[http://media.comicvine.com/uploads/10/101644/2057926-silentwar002016.jpg Karnak calls him "Earth's most powerful warrior."]]
%%* WouldHitAGirl: And kill a girl, too.
* YouCouldHaveUsedYourPowersForGood: Basically his entire character in a nutshell. Could have been Earth's greatest defender, but turned out to be a deadly disappointment.
* YourCheatingHeart: Lindy has this issue in The Sentry V2, besides preferring the Sentry persona instead of ol' Bob, she also had to cope with her husband's unstable presence by seeking an affair with her Yoga instructor Ramón.
* YourMindMakesItReal: The Void isn't a second personality in the traditional sense but a delusion Bob gets due to his schizophrenia. He believes he is the Void and, due to his powers, he ''becomes'' the Void.