[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/Pluto_title_3790.jpg]]

->''Listen, Professor Ochanomizu... you don't understand anything about artificial intelligence. Frustration and failure... seething hatred... Emotions so powerful they lead one to want to kill...'' That's ''what fosters true artificial intelligence...''

->''Perfection is in the mind that makes mistakes... And that, Professor, is what will give birth to'' [[ArcWords the greatest robot on Earth]]...
->--'''Professor Tenma'''

A manga by Creator/NaokiUrasawa, the man behind ''Manga/{{Monster}}'' and ''TwentiethCenturyBoys''. The story is an UltimateUniverse reimagining of the classic ''Manga/AstroBoy'' story arc "The Greatest Robot on Earth" (which can be found in ''Astro Boy'' book three, in case you want to check it out before reading the remake).

In a world where humans and sentient robots co-exist, someone or some''thing'' is targeting the seven most advanced robots, killing them off one by one. Even more disturbingly, the same killer seems to be murdering humans as well. Only a supremely powerful robot could be killing the other robots--but [[ThreeLawsCompliant all robots are hardwired to be unable to kill humans]], with one very important exception.

German robot detective Gesicht (German word for 'face'), who is so advanced as to be nearly indistinguishable from a normal human, investigates the killings in an effort to learn the secret link between the advanced robots and humans being murdered. This is an especially urgent matter for Gesicht, since [[RaceAgainstTheClock he's one of the scheduled murder victims...]]

No relation to the former planet, [[ClassicDisneyShorts nor the]] [[PlutoThePup cartoon bloodhound]], nor the [[Franchise/SailorMoon Sailor Senshi]], nor the [[ClassicalMythology Roman god of the Underworld]]. [[spoiler:Okay, maybe that last one.]]

Universal just picked up the rights to make a [=CGI=]/Live Action movie.

Also, this manga [[PlutoIsExpendable is not expendable]].
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!!This manga provides examples of:

* AbusiveParents: Tenma ''sold'' Atom. Is that abusive enough for you?
* AchievementsInIgnorance: The American meteorological robot Arnold discovers a crack on the roof in a building he happens to be in; [[spoiler:he doesn't have to dig in that much further until he discovers by serendipity that there is a great seismological increase in the United States of Thracia, correctly speculating that there could be a nuclear device under the surface.]] He is quickly dismissed by Dr. Roosevelt and the Thracian President as a potential SpannerInTheWorks. Because he is known to be an eccentric robot, Arnold is effectively [[TheStoolPigeon the least influential individual possible to have discovered the truth]].
* AdaptationDistillation: While it mostly focuses on expanding a single story arc, it also incorporates elements from the greater Astro Boy mythos at large. For instance, Atom's death and return were taken from the tail-end of the ''Blue Knight'' saga and the idea of Darius trying to legitimize his dictatorship by claiming descent from an ancient ruler from antiquity comes from the ''Cleopatra's Heart'' storyline.
** Police Inspector Tawashi is nowhere as antagonizing towards Atom as he is in the original manga, though he is still very resentful of robots in general. Still, there are factions of humans that do have a vitriolic hatred of robots.
* AIIsACrapshoot: Averted for the most part. Even human-killer Brau 1589 has no malfunctions in his programming (that is, there's nothing ''inherently'' wrong with him - he's pretty obviously insane, but that's not due to the way he was built). Several characters openly wonder if that willingness and ability to kill is, rather, the self-''perfection'' of A.I. [[spoiler:Dr. Tenma even proclaims that an A.I. willing to lie to ''itself'' is the pinnacle of A.I., the true emulation of human nature]].
* AmnesiacDissonance: [[spoiler: Gesicht]].
* AnyoneCanDie: bordering on KillEmAll.
** To give you an idea on just how far this trope goes: [[spoiler:Gesicht, ''the main character'', dies two volumes before the end.]] Though if you've seen the original 'Greatest Robot on Earth' story anywhere else you could pretty much see that coming.
* ArcWords: "500 zeus a body." and "Bora".
* ArmCannon:
** Gesicht's [[MorphWeapon left hand can transform]] into two different non-lethal weapons: one that shoots knockout gas, and a version that can shoot a "stun" beam. His right arm, however, transforms into an incredibly dangerous Cluster Cannon complete with Zeronium Missiles.
** The champion in this regard is North #2. He has four arm cannons: two that look like gatling guns and two that look like energy cannons.
* AscendedExtra: Gesicht didn't last seven pages back in the original story, now he's the hero.
* AuthorityInNameOnly: The President of the United States of Thracia.
* BadassBystander: Hogan the bodyguard is a large, beefy robot assigned to protect Epsilon (he notes the irony - if not for the weather, Epsilon could protect a whole continent on his own). Normally he wouldn't fall under this trope, but he protects Wassily from the collateral damage caused by Epsilon and Pluto when they finally fight.
* BecomeARealBoy: Many robots try to act as human as possible, wearing clothing and even eating food; in Atom's case, he even goes to the bathroom (although not for the reason you'd expect) despite it not being necessary. At the other end, Heracles is a notable exception, being well aware and perfectly comfortable with his not being human.
* BigDamnVillains: [[spoiler: Brau 1589. It says a lot when a barely functioning robot somehow escapes a high-security prison and pretty much ''crawls'' to finally bring down Roosevelt and the president of Thracia while having a giant spear stuck in him.]]
* BigNO [[spoiler: When Tenma reveals to Abullah that he was the "perfect robot" he created.]]
* BladeBelowTheShoulder: North #2 has two of these.
* BodyguardingABadass: Epsilon, one of the most powerful robots in the world if not actually the most powerful, is guarded by a somewhat generic security robot. Said robot even remarks on the irony of it.
* BreakTheCutie: Atom comes awfully close a few times.
* BreakTheHaughty: [[spoiler: Happens to the President of Thracia, who ordered the invasion of Persia under the pretence that they were creating robots of mass destruction (actually so he could expand his empire), only for it to turn out that Persia DID have robots like that and now they're mad for revenge and about to ''crack Thracia's continental plate''. The once SmugSnake is reduced to a cowering wreck hiding in a bunker. Then Brau-1589 shows up.]]
* BrickJoke: Gesicht's conversation with little Ali the first time they met. [[spoiler: The second time they meet, Ali kills Gesicht]].
-->'''Ali''': Will I see you again?
-->'''Gesicht''': Yes, I'm sure you will.
* CallingCard: Pluto's mark is leaving something in the shape of horns by or on the victim. It's a method of identification until [[spoiler: he does it to Brando (using his arms as the horns and his memory chip as the head)]], where it has more of a "bragging" feel to it.
* CannotTellALie: Invoked as part of the [[ThreeLawsCompliant Three Laws of Robotics]], but ultimately averted in several ways. [[spoiler:The more advanced an A.I., the more capable it is of emulating humanity, including ''lying'']]. Most importantly, [[spoiler:Goji lying to ''himself'' that he was Abullah, and therefore human. This, according to Dr. Tenma, marks him as the Greatest A.I. ever.]]
** The four other instances of an advanced AI lying are [[spoiler:Brando, lying to his family and to his assistant, before going off to battle Pluto, Abullah, lying to Gesicht in the latter's inquiry, which causes Gesicht to "positively" identify Abullah as human, Uran, lying about the nature of the robot she found, and Atom, lying to Helena about the gap in her and Gesicht's memories.]] In the last case, the person being lied to knows it immediately, but acknowledges it as a small kindness.
* ChekhovsBoomerang: [[spoiler:Zeronium Cluster Cannons.]]
* ChekhovsGun: Atom and his sister are frequently misidentified as human, even by other robots. This ability becomes an important plot point later.
* ComicBookFantasyCasting: Dr. Tenma is Leonard Bernstein. Mr. Mustachio is Wilford "Diabeetus" Brimley ([[Manga/{{Monster}} in his second role in a Creator/NaokiUrasawa production]]).
* CompositeCharacter: [[spoiler:Abullah/Goji is actually a combination of three different ''Manga/AstroBoy'' characters. The original Abullah/Goji from the classic ''Strongest Robot On Earth'' story; a one-shot character from another classic manga story entitled ''The Blast Furnace Mystery'', a robot whose creator had raised him to believe he was really Human; and Shadow, an original character from the 2003 series who was created by Dr. Tenma and replaced Abullah and the Sultan in that version in order to fit it better with the series' MythArc.]]
* ConsultingAConvictedKiller: Gesicht is tracking a serial killer who might be a robot, and consults Brau 1589, previously believed to be the only robot who ever killed a human.
* ContinuityNod: All over the place; "Pluto" is basically Urasawa's tribute to OsamuTezuka.
* CoolOldGuy: Prof. Ochanomizu. As the Science Minister, he tells ministers more powerful than him (in theory) to shove it. As a man of science, he works throughout the night to try and save a dying robot dog. And as a lover of peace, [[http://view.thespectrum.net/series/pluto-volume-1.html?ch=Volume+04&page=24 he would rather die than allow Atom to fight an unnecessary battle.]]
* CreepyChild: Atom falls into this occasionally - he seems to like being a normal kid, but doesn't hesitate to shed that persona when things get serious. Wassily too, although he's suffering from some form of PTSD.
* CurbStompBattle: Atom vs. Pluto: If you can even call it that...
* CuteBruiser: Atom. [[spoiler:When he grabs and stops Pluto's [[CombatTentacles tentacle]] dead before it can skewer him, rips it out, then forces himself out of Pluto's fist to twist his arm off, I'd say he qualifies]]. Uran is also at least as powerful as a human adult, but never has to show off.
* DarkerAndEdgier: An downplayed version of Astro Boy. Urasawa doesn't change the basic plot at all, resulting in most of the same major robots dying as did in the original. [[spoiler: ie [[KillEmAll all of them.]]]] What made the story darker was the fact that each robot was developed, rather than simply being a collection of powers to be destroyed by Pluto.
* DeathByFlashback: [[spoiler: Several of the robots have flashbacks before getting killed, but specially Gesicht]].
* [[spoiler:DecoyProtagonist]]
* DoAndroidsDream: AI units have a subconscious and in some cases the ability to dream, with the additional benefit of being able to save them to memory. This proves to be a major plot point later on.
** Beyond that, Gesicht seems to have incorporated a transmission from Atom into a dream at one point, such that it's basically a [[PsychicDreamsForEveryone prophetic dream]] until he figures out what happened.
* DoomedByCanon: [[spoiler: Everyone that is not Atom.]]
* TheDreaded: Brau 1589 [[spoiler: and Bora.]]
* DwindlingParty: The seven robots are the only ones who stand a chance against Pluto. Too bad they all get picked off throughout the story.
* DubNameChange: Of a sense. Gesicht was named the much more generic and stereotypical German name Gerhardt in the original Tezuka stories. Or at least the English translation; we're not sure about the Japanese original.
* TheEmpath: Uran.
* EndOfTheWorldAsWeKnowIt
* EvenEvilHasStandards: The anti-robot Ku Klux Klan stand-ins were horrified when one of their members killed a robot child. [[spoiler: Also, Brau 1589 does not take kindly to an OmnicidalManiac.]]
** The first one might be a subversion. While the robot KKK were horrified, they had no problem using the consequences ([[spoiler: the enraged robot father breaking the laws of robotics to kill the man in vengence]]) to their advantage.
* {{Expy}}: Several characters look ''a lot'' like characters from some other Urasawa series.
** Granted, several of those Urasawa characters were Expies of Tezuka's Star System, so they're really just coming full circle.
** Speaking of "full circle", ''Pluto'''s version of Professor Tenma is strongly reminiscent of [[Anime/NeonGenesisEvangelion Gendo Ikari]] -- who isn't entirely unlike the original version of Tenma from ''Manga/AstroBoy''. (He's actually drawn off of [[https://secure.wikimedia.org/wikipedia/en/wiki/Leonard_Bernstein Leonard Bernstein]] in his younger days, of all people.)
** Though it's never said out loud, Brau 1589 bears considerable resemblance to [[Literature/TheSilenceOfTheLambs Hannibal Lecter]] in personality, though he takes design cues from the (original) Blue Knight "Blue Bon".
* FantasticNuke: Epsilon's Photon Energy, which seems to be something like solar-powered intense radiation.
** Not to mention the Anti-Proton bombs that Urasawa is so fond of.
* FantasticRacism: to the point there's even an anti-robot version of the KKK.
* FantasyConflictCounterpart: It's only seen through flashback, but the war between Thracia and Persia is heavily based on the [[TheWarOnTerror Iraq War]] (with robots). The United States of Thracia accuses the Middle East nation of Persia of making Robots of Mass Destruction, but before other countries can complete their investigation into whether it's true, Thracia sends troops in and starts a horrific, wasteful war that devastates the country. And this is all just a ploy to make Thracia the world's main superpower.
* ForegoneConclusion: This is a PerspectiveFlip of Tezuka's "World's Strongest Robot" arc, meaning that anyone who's read that knows that [[spoiler:Gesicht is ''screwed'']]. For that matter you'd know that [[spoiler:Atom doesn't stay dead.]]
* GambitRoulette: At the end of the series [[spoiler:it is revealed that the Dr. Roosevelt (the [[CreepyChild robot teddy]]) had Thracia invade Persia, causing Abullah to lose his family, and thus create Pluto to attack Thracia and the world's seven most advanced robots. Doing so would insure Thracia's dominance in the world once its disadvantage in robotics was made moot -- and activate a [[EarthShatteringKaboom very large bomb]] that [[ApocalypseHow would kill most of humanity]] and establish robots as the dominant species on the planet. However, Atom is repaired and enhanced with the emotions from Gesicht's memory chip, and not only defeats Pluto, but convinces him to stop the bomb. Roosevelt also doesn't count on Brau escaping and coming to kill him personally.]]
* GirlishPigtails: Uran.
* GovernmentConspiracy: [[spoiler:The Bora Investigation was part of a setup to establish the United States of Thracia as the world's main superpower.]]
** Not to mention [[spoiler:the cover-up the European Union pulled when it turned out Gesicht wasn't ThreeLawsCompliant]].
* HannibalLecture: Brau 1589, although not in the usual way[[note]]We only ever see him interviewed by robots, and the traditional Lecture doesn't quite work on them[[/note]]; Gesicht eventually exchanges memories with him (to get a killer's perspective on the weird crap that's been happening) and this has a negative effect later on, but he's otherwise cooperative. (Aside from this, he emits powerful magnetic waves that will kill unprotected 'normal' robots within a certain range - 4 have already died this way before the manga starts.)
* HeroKiller: The eponymous villain.
* HeroicBSOD: Gesicht has one [[spoiler:moments before his death.]]
* HopeSpot:
** When he survived his bout with Pluto, you ''really'' thought [[spoiler: Gesicht]] was going to survive.
** Not just [[spoiler: Gesicht]], but [[spoiler: Epsilon]] as well.
* IAmNotAGun: Pick a powerful robot. Heracles was the most comfortable with the war as a fighter, and even he laments that "That war was no fight" - the others don't handle nearly as well, and deal(t) with it in various ways. (Moreover, given how inclusive society has become, they have no trouble fitting into civilian life, possibly excepting North #2.)
* IKnowYouAreInThereSomewhereFight: Gesicht, Epsilon, and Atom in their respective fights against [[spoiler:Pluto AKA Sahad]].
* ImplacableMan: Pluto.
* InstantDeathBullet: Averted with [[spoiler:Gesicht]]; it takes him a while to realize he's been shot with a ''Cluster Cannon''.
* IronicEcho: Montblanc didn't like the idea of a statue of him littering the Alps, and while the pedestal was built, the statue apparently wasn't. Heracles didn't like the idea of a statue of him littering the Greek sealine (and distracting from the old ruins nearby), but his statue got built and placed anyway.
** After a robot policeman is killed in duty, Gesicht offers to erase his wife's memories to ease her suffering. She refuses, because she would rather keep him in her memories, and grieves in her own fashion. [[spoiler:After Gesicht's son is brutally murdered, and he kills the murderer in his fury, both Gesicht and his wife Helena's memories of the child (and killing the murderer) are erased, which results in Gesicht never quite getting over it, living with an inexplicable hatred inside him, and suffering horrible nightmares]].
* JustAMachine: [[spoiler: The child robot that Gesicht rescues, in particular.]] Otherwise averted, although Ridiculously Human bodies are only that without a mind in it.
* LawyerFriendlyCameo: There's a blink-and-you'll-miss-it one for Manga/BlackJack in the arc about North #2.
** ''KimbaTheWhiteLion'' also makes a cameo as an escaped zoo animal during Uran's debut.
* LocardsTheory: The fact that no trace evidence can be found at any of the murder scenes leads the investigators to conclude that the SerialKiller they're looking for is a robot.
* MasterComputer: Dr. Roosevelt.
* MeaningfulName:
** Professor Roosevelt is named after Theodore Roosevelt, the originator of the teddy bear.
** "Gesicht" is both German and Dutch for "face".
** Brau 1589 gets his name from the original "Blue Bon". "Brau" is similar-sounding to "Blue", whereas 1589 is the year when the [[https://secure.wikimedia.org/wikipedia/en/wiki/House_of_Bourbon House of Bourbon]] took over in France -- in other words, one ''hell'' of a historical ShoutOut. In fact, Brau is probably a mistranslation. It's probably supposed to be Blau, German for blue.
** Ochanomizu is Japanese for ‘tea water’.
* MouthyKid: Uran.
* MythologyGag: Several. The various jabs about the doggy cop cars, KimbaTheWhiteLion's brief cameo and more. And in the North #2 mini-arc, Paul Duncan mentions his life was saved by a famous Japanese doctor.It's almost certainly Manga/BlackJack, as what we can see of him has him wearing his characteristic long black coat.
** In many panels Atom sports a kind of double cowlick, referencing his [[TropeMaker trope making]] AnimeHair.
* NamesTheSame: The Dr. Tenma in this series has no relation to [[Manga/{{Monster}} a certain other Dr. Tenma]].
* NorseMythology: Brau 1589's character design seems to be based off of Odin, particularly the story where Odin sacrificed himself to himself.
* NothingIsScarier: It takes several volumes before we get a full view of Pluto, which makes his appearances that much more terrifying.
** In universe example: What did they find in Brau 1589's programming that caused him to avert ThreeLawsCompliant? Nothing. There was nothing wrong with his programming and [[ParanoiaFuel nothing there that can explain why any other robot couldn't do the same.]] This seems to be one of the reasons why he is being kept in complete isolation other than, of course, his murderous ways.
* OffWithHisHead: [[spoiler:Epsilon.]]
* OhCrap: The president of Thracia, see BreakTheHaughty.
* OurHeroIsDead: Of ''course'' [[spoiler:Atom]] isn't going to be gone for good. [[spoiler:''Gesicht'', on the other hand...]]
* OutDamnedSpot: Happens to a robot that served with Heracles.
* {{Pacifist}}: Epsilon refused to be drafted due to this, although he readily admits to some cowardice. (The irony being that he's easily the most destructive of the strongest robots.)
* PapaWolf: [[spoiler:Gesicht's [[UnstoppableRage rage]] at his "son's" death is so great that he breaks one of the [[ThreeLawsCompliant Three Laws of Robotics]] to get his revenge]].
* PersonOfMassDestruction: Montblanc, North #2, Brando, Heracles, Gesicht, Atom, and ''especially'' Epsilon.
* PerspectiveFlip: Essentially this is the original Astro Boy story from the POV of a (previously) minor character.
* PlayingAgainstType: A ReusedCharacterDesign version. Urasawa gives Epsilon the same character design as Johan from ''Manga/{{Monster}}''.
* PostCyberpunk
* PosthumousCharacter: Montblanc [[spoiler:and the real Dr. Abullah]].
* PowerBornOfMadness: This is what happens when a robot is filled with rage and hatred, apparently.
* PowerOfHate: According to Tenma, the only thing that separates humans and humanoid machines is that humans have the capacity to hate others. A machine that possesses this quality is no longer considered merely a machine.
* ThePowerOfTheSun: Epsilon, as long as he has time to (re)charge in sunlight.
* PoweredArmor: Brando and Heracles both use these when fighting in the war and the ring (they're wrestlers during the day), though they have to detach their heads from their general-use bodies.
* RedemptionEqualsDeath: [[spoiler:Pluto, fighting off Bora who is about [[EndOfTheWorld to lay waste to the entire world]] with a supervolcano. The supervolcano eventually does erupt, but Pluto freezes the lava.]]
* RedHerring: [[spoiler:The fact that scanners identify the figure in the dead policebot's memory files as human. Abullah believes himself to be human so hard that he acts it convincingly enough to fool modern equipment, even when performing obviously inhuman feats like vaulting between two skyscrapers.]]
* ReplacementGoldfish: Atom was [[TropeCodifier originally created]] by Dr. Tenma as a [[ItWasHisSled replacement for his son]] Tobio.
* RestrainingBolt: All robots are equipped with a device that dampens emotional responses as one of the failsafes to ensure that they stay ThreeLawsCompliant. [[spoiler:Advanced robots can overwhelm the block with a sufficiently strong emotion -- say, UnstoppableRage.]]
* {{Retirony}}: [[spoiler: Gesicht]] attempts to retire or get vacation time only pages before he dies.
* RidiculouslyHumanRobots: Almost all of them, except Montblanc and North #2. Gesicht has trouble telling that Atom is a robot at times.
** Many robots, such as Brando and Heracles, use a Ridiculously Human body in their free time in addition to a more "robotic" body for their main jobs, finding that easier to fit in with society.
*** [[FridgeBrilliance ...which should tell you something about Montblanc and North #2.]]
* RoboticReveal: [[spoiler:Abullah is in fact the robot Goji, who Dr. Tenma created.]]
* RobotWar: The 39th Central Asian Conflict 4 years ago.
* SealedEvilInATeddyBear: Dr. Roosevelt.
* SeiunAward: In 2010.
* SenselessSacrifice: [[spoiler: Brando tried a HeroicSacrifice by fighting against Pluto, so Gesicht can use live footage from Brando's eye camera to find Pluto's weakness. But then Brando's life flashes before his eyes, [[TearJerker ruining the Pluto footage and rendering it useless.]]]]
* ShapeShifterSwanSong: [[spoiler:the "hyper-intelligent" robot Tenma created can simulate billions of faces as it finds the personality that best suits it. When confronted by the AwfulTruth about itself, its face morphs into Gesicht's, Brando's, Hercules', and Epsilon's before reverting to a featureless, lifeless base form]].
* ShellShockedSenior: Several of the robots that participated in the 39th Central Asian Conflict, but ''especially'' North #2.
* ShoutOut: Arguably, the first appearance of Pluto in Chapter 1 ([[http://view.thespectrum.net/series/pluto-volume-1.html?ch=Volume+01&page=11 see here]]) is a reference to [[http://atticannie.files.wordpress.com/2009/09/the-scream-edvard-munch.jpg Munch's painting,]] TheScream.
** Accepting that, one gets a second ShoutOut. Tezuka enjoyed referencing famous works of art in his work, and doing so could be considered a Tezuka reference in itself.
** While Prof. Ochanomizu looks about what you'd expect him to in Urasawa's style, he's apparently based on ''Tezuka''.
** Blau One Five Eight Nine's obvious similarity to Hannibal Lecter, of course. Interestingly, the very first storyline of the recent ''Series/{{Hannibal}}'' TV series also features a serial killer who uses antlers as a calling card, though this may just be a coincidence[[note]]While the killer in question, The Minnesota Shrike, was mentioned in the original books, the antler thing was made up by Creator/BryanFuller out of whole cloth[[/note]].
*** In another amusing parallel, Will Graham's bizarre "Stag Man" hallucination looks very similar to Pluto himself, minus being a giant robot.
* SpannerInTheWorks: [[spoiler: Atom, Pluto and [[BigDamnVillain Brau]] to Dr. Roosevelt]].
* TakingYouWithMe: [[spoiler: Brau killing Professor Roosevelt with the spear he had been impaled with. Brau had previously declared that removing the spear from his body would kill him.]]
* TearsFromAStone: Most advanced AIs are ''capable'' of crying, but only in order to better simulate human behavior. When they cry for themselves ''and mean it'', you know it's important.
* TeachHimAnger: In a double example, [[spoiler: Tenma does this to to both Goji and Atom to awaken them.]] It works, but in completely different ways, and not quite in the way everyone expected. [[spoiler: Goji, overwhelmed by the hatred Abullah carried with him at his death, awakened and proceeded to convince himself that ''he'' was Abullah, and therefore human. Atom instead learns the folly relying on anger and hatred to win, and in fact realized the futility of those emotions instead]].
* ThereCanBeOnlyOne: this trope is inherent in the phrase "World's Strongest Robot" but in practice it's more of a DwindlingParty situation - there's really no force on Earth that can stop Pluto [[spoiler: and Bora]] once the "Strongest Robots" are dead.
* ThreeLawsCompliant: At least the First Law is supposed to be hardwired in all AI units. The only cases of a robot breaking it were Brau 1589 and [[spoiler:Gesicht]].
** And [[spoiler:Abullah/Goji/Shadow, though this may not technically count, since he apparently [[TomatoInTheMirror believed himself to be human]].]]
* TomatoInTheMirror: [[spoiler: Abra]]
* UltimateUniverse: Frequently compared favourably to Marvel's Ultimate books. Interestingly, this version mixes elements of both the original 1960s version and the 2003 anime.
* UnintentionalPeriodPiece: The Iraq War and Saddam Husein's capture and execution loom large in the story, despite ostensibly taking place in the future.
** Strangely enough, the original ''Manga/AstroBoy'' manga from the 1950s actually has Astro being created in 2003, the same year as the Iraq War began.
* {{Unobtanium}}: The Zeronium Alloy that Gesicht is made from, as well as the ultra-heavy Zeronium weapons. They can tear through almost anything, and it takes a special type of particle gun to destroy it.
* VillainousBreakdown: When [[spoiler:Abullah is confronted with the truth about himself, he pretty much explodes with denial until he (or, rather, his current body) just overloads and collapses]].
* WeCanRebuildHim: Part of Abullah's back story. [[spoiler: A fraudulent part.]]
* WeHardlyKnewYe: Montblanc. (The story takes pains to flesh him out in flashbacks, and it's clear he was a very good guy.)
* WhatIsThisFeeling: Robots who feel love, grief, or utter hatred for the first time will indubitably utter this phrase.
* WhatMeasureIsANonHuman: Explored very thoroughly.
* WoobieDestroyerOfWorlds: [[spoiler:Pluto]]

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