This page is full of unmarked SPOILERS, being speculation about a story with many mysteries.
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The Grand List Of Things We Know For Certain:
Confirmed Theories and facts.
Christa is far more important than we realize.
Hannes will once again face off against the Titan which killed Carla
Hannes will die fighting against the titan he was too scared to do so before.
Things We're Pretty Sure About, But Can't Confirm:
Theories that have not yet been explicitly confirmed, but are heavily implied.
Theories that have been proven false.
All of the Titan Shifters grew up inside the walls, but were subverted and turned against humanity or were raised by human factions to unknown ends
The purpose of breaching Wall Maria in 845 isn't just to retrieve Eren, but rather to expand Titan territory.
Titan reproduction.Maybe they eat humans to chemically modify them in their stomachs, and after regurgitating the dead, they turn into more titans?
Dr. Jaeger is responsible for Reiner's, Annie's, Bertolt's, and Ymir's status as Titan Shifters
Titans' eating habits are actually attempts to replace a dead pilot
Sasquatch Titans were what the Titans were originally designed by humanity to fight
The regular Titans are actually some form of plant life, and the Titan Shifters are made using their extracts.
The Titan Ilse met......is going to appear again very soon. All the Titans in the forest are running after the Squad towards Reiner, Berthold, Ymir and Eren, so this one will be among them and this time will finally find the Ymir-sama it's been looking for. After which something may or may no become clearer.
The unintelligent Titans are infants.
Titans are "born" from the vomited human remains they leave behind.
All Titans are capable of speech.
The Smiling Titan is a Titan Shifter.
The Smiling Titan is Hitch.
The Smiling Titan is Moses.
The next arc will be Bert and Reiner trying to rescue Annie
Sooner or later, Eren's going to confront the Titan that ate his mother.....but only after s/he's turned back into a human.
There will be an attack on the human settlement area while Eren is taken away.
Levi had a role in mikasa's parents death
Irvin Smith is the King
Theories about Eren
Theories concerning Eren Yeager, his origins, powers, and the Coordinate.
Eren's difficulties with his Titan form are a result of being the CoordinateWhen one thinks about it, Eren has the most difficulties with his Titan form of all the Shifters we've seen so far. He doesn't have any special powers like Annie's specialized hardening, Bertolt's heat-shield, Reiner's body armor or Ymir's insane agility, and he's almost lost his humanity twice, once while just training. Plot-wise it makes sense that the main character wouldn't have perfect control, but perhaps the in-story reason is because he is both the Coordinate and a Titan-Shifter, and the two powers are either incompatible or simply interfere with one another. Grisha made Eren a Shifter in order to protect him—and possibly the Coordinate ability but he didn't, couldn't forsee how the two would adversely react. The argument could be made that the Shifter trio had been trained in the use of their powers for their mission thus, their superior abilities, but what about Ymir? She may have knowledge of the Ancient Conspiracy and history of the world, but she outright states that she barely knows anything about her own Titan powers. Yet she was able to harness her Titan form easily when it's implied the only other time she shifted since regaining human form was rescuing Daz.
Eren's regeneration "burnt out" during the Raid on Stohess DistrictDuring his fight with Annie, Eren starts burning after she knocks him into the house and bashes his face in. It's been shown that, compared to other titans of his size, Eren's regeneration is slow - this may be because of his youth or because he's not as physically strong in human form as the other shifters are. This suggests that Titans have a regeneration limit, possibly based on how much sunlight they've absorbed and how much they can store; if forced to their limit they have to slow down or they'll catch fire because of their extremely high internal temperature. Note that, after he catches fire, none of his limbs regenerate for the rest of the fight. It's possible that other Titans simply *can't* continue fighting past the point that they can't regenerate, or perhaps that they simply don't, being more disciplined and experienced in their titan forms - Eren's Titan Form is simply too bloodthirsty to slow down and consider tactics.
All of Eren's dreams are prophetic in some way, but not the same way every time.He has the foreshadowing dream in the first chapter, and later dreams of his father injecting him with something, and he's dreaming of being home with his parents while he's in his Titan form. It's possible that every dream he has is connected to either an event that hasn't happened yet, or one that only happened in another timeline.
Eren is headed for a major emotional crisis, as a direct result of his Black and White Morality.Eren has a very stark view of the world, with little room for moral grey areas or sympathy for anyone he considers evil. As a child, his viewpoint resulted in him brutally murdering criminals with the justification that they weren't human. In his confrontation with Reiner and Bertolt, he echoes this opinion that they aren't human and expresses anger over the very idea that Reiner might be guilty over his actions, accusing him of playing the victim. Ymir even criticizes him for how simplified and immature his worldview is, making it clear she cannot trust him when he has those sorts of attitudes. Considering the dark nature of the series, and the many harsh lessons Eren has already gone through, it's unlikely his black-and-white attitude will be changed in a way that won't involve him suffering a major blow.
Eren will learn to use multiple Titan forms, aside from his usual 15-meter class Titan.Eren's ability to form partial-Titans may be allusion to this, allowing him to adopt multiple Titan forms later as the series progresses. This might come in handy if, say, Eren needs to fight in a large building without destroying its roof in the process.
Eren is not the "Coordinate".We know that the Titan Trio first launched their attack as part of a mission to locate the "Coordinate", which they think might be Eren. However, Eren did not receive the injection which appears to have given him his powers until after the destruction of his home. Therefore, he is not the one they were looking for and this is a concern that Reiner voices when debating their next move. However, Eren may still have some connection to what is presumably a person, and this is why the Shifters remain so willing to risk everything to capture him. The basement may contain hints to this mysterious person, or perhaps Dr. Yeager knew about it. (One of the biggest issues, of course, is whether "Coordinate" as used in the English language is completely accurate to the original context and meaning in the Japanese language.)
Eren is not the Coordinate, because the Coordinate is not a person.Rather, the Coordinate (or whatever the word is that's being translated as Coordinate) is actually an ability that can be granted to someone through some artificial means. Grisha engineered it or stolen it, and gave it to Eren instead of allowing it to fall into enemy hands.
The "Coordinate" is located in the Yeager basement.The coordinate is not a person/titan, but rather the stash of info on titans. Coordinates typically refers to locations rather than objects, and it is a location that everyone on humanity's side wants to get to- save for possibly the wall cult, who will want to destroy it. It would be a matter of who gets there first- the 'liberated' titans or humanity.
One of Eren's parents is a Titan
Eren is an original TitanThe injection Dr Jaeger gave him wasn't something that would give him his ability to transform into a Titan but a temporary cure or something that would keep his powers hidden and also make him forget about this. This can explain how Titan knew what he had to do to shift into titan-mode.
Eren was injected before the series started.Something is not jiving with the scene where Grisha injects his son. One of the things that Eren says to Grisha is "you haven't been the same since Mom died!" This implies that Eren has been around his dad long enough to notice changes, which couldn't have been after Shiganshina fell. It's clear from the scene that Eren & Grisha are alone; if this took place after the first episode, there's just no way in hell Mikasa would ever let Eren out of her sight, considering how protective she is of him and how close they've brushed death. So, the conclusions: 1. Carla Jaeger was not Eren's biological mother, but was rather a woman who Grisha married some time after the injection. The serum erased Eren's memories of his original mother so he quickly accepted Carla as his mom. 2. The serum's side effect also gave Eren a viciously sociopathic Hair-Trigger Temper, which explains how he could kill three criminals at the age of 9 without blinking an eye or suffering any kind of trauma over it.
The nature of the CoordinateSo far, the three Teen Titans' mission to discover "The Coordinate." The audience doesn't really know what that is; However, as in all things Shingeki, Isamiya might have other plans as to what the coordinate really is.
Eren isn't the coordinate they were looking for... this time around.The reason Annie, Reiner, and Bertholdt spent so long looking for him without finding him is because the Coordinate was supposed to meet them as soon as they got into the city when they were kids. Eren wakes up on the first page, knowing that the Titans are going to break the wall... but that's all he remembers. THAT is why he's crying for no reason: subconsciously, he knows he's forgotten everything he was supposed to remember, and he's just started the loop over again, all for nothing. Sending his consciousness back in time was supposed to send him back with all his knowledge, so that he could intercept the Titan-Spies, explain everything he'd already gone through in the future and all the knowledge that came with it in order to change the path of history. This has been the plan all along! How different would it all have turned out if someone Annie, Reiner, and Bertholdt's own age found them in the crowd and said, "I know who you are, I'm the one you're looking for, here's everything I know, everything you've done hasn't been in vain: let's grow up and save the world"?
The girl in Eren's memory during chapter 53 is…
Eren and Historia are related.Grisha was a doctor (well-to-do, educated) who had access to Titan knowledge, and we don't know anything about Carla. It seems like the natural thing to assume he discovered or stole his knowledge of Titans and Titan-shifters, but there's no reason he couldn't have had it all along, or that he couldn't have "married into" the knowledge by marrying a girl from a noble family. It's possible that Eren is also from a noble bloodline through one of his parents, and what Grisha was going to show him in the basement that day was his birthright all along. The reveal would also mark a third time that Eren, in a condition that shouldn't be any different from anyone else of his type, is suddenly shown to be special in some way (ordinary soldier to Titan-Shifter, Titan-shifter to Coordinate, poor orphan to noble heir).
The girl in Eren's memory is Eren HER selfThe girl in Eren's flash back is apart of the Reiss family. Long ago the Reiss family stole the coordinate and gave it to one of their own. She became a titan and rampage and was forgotten. Later she came back to human form by devouring a young boy. She harvest his body and organs to rebuild her own body, being reborn as a young male child with memory loss and was raised by Grisha Jager who knew about the truth because his wife Carla is a Reiss as well. He gave Eren injections to repair her damage memories and return her power to become a titan and command them.
The girl in Eren's memory is his mother, CarlaWhat's curious about the description of the Coordinate is that Reiner imples it as being "passed on." I'm thinking that the Coordinate is something either inherited or passed on forcibly via injection or some such (which would explain why Grisha wants to inject Eren with something in the Manga.]] NOW, why is it that Eren has a flashback about his mother? Its because she was the original Coordinate, and when it passes on, it includes memories from the previous Coordinate.
Theories on the Titans' Origins
Theories about the Titans, their origins, and their purpose.
Building on the below WMG, Titans were specifically made an organic alternative to Humongous Mecha suits by an advanced civilization due to resource shortages due to a war. That, and it was just better logistically.Titans are apparently powered by sunlight, are extremely light and possess no reproductive or digestive organs. All of that is odd for a living creature, but is perfectly understandable if they were created as weapons. The how is unclear but the why could simply be that there were no more resources left. A mechanized suit requires fuel of some kind which would be problematic if you are facing severe shortages due to wartime. However if you can create a means of attack that runs solely on the sun for power, it alleviates that problem. Again, it also deals with the shortage of resources by taking care of any biological needs of soldiers piloting the weapon, as they don't need to eat, drink or sleep, and are even protected from aging, apparently while the "suit" is active. Strategically speaking, enemies can see a huge mechanical battle-suit coming at them from miles away...but a soldier who can form a giant body around themselves from nothing after sneaking amongst you is far deadlier, as the Survey Corps found out the hard way. Somewhere along the line this program was either sabotaged, perhaps by the enemy, perhaps in protest or maybe someone simply made a mistake. Either way the malfunction caused the pilots to be entirely absorbed into the "suit" until their central nervous system was all that remained, their brains either insensible or lost in a Lotus-Eater Machine while the suits ran on autopilot, attacking anything human.
The Titans are scientific experiments on biological weapons of mass destruction.This is similar to how zombies are often used in movies, and it would explain how the titans have so easily taken over as well as how Eren can transform into a Titan. This ties into how Eren's father could be involved in the plot overall.
The Abnormal Titans have the same origin.This isn't necessarily surprising, since this has already been speculated in-story, but it would make sense if the formula that Eren's father used to turn Eren into a "Human able to don the flesh of a Titan", was the same formula that created the others, only from a different group of Humans.
The Titans are the result of a disease or genetic mutation, artificially created to control the population.Eren's father was working on finding a cure when the Colossal Titan attacked. He was planning to show Eren what was in the basement because he knew it was almost ready.
The Titans were made as an effort to unite humanity, and it backfired horribly.At one point, Pixis talks about how, once upon a time, humans squabbled over race and principles, and "someone" once said that if humanity had an enemy that wasn't human, they would have to band together and put aside their differences to succeed; Eren answers that he's familiar with that piece of folklore. It's more than just folklore; it's the explanation for why the Titans exist, warped by generations' worth of word-of-mouth into ordinary apocrypha. It may also explain the significance of the walls: they represent strength through unity. Especially if the first Colossal Titans volunteered to serve as the foundation for the walls, hoping that they could further humanity's goals by doing so; it fits in nicely with the conceit of self-sacrifice, because if the Titans hadn't been made at all, none of the atrocities in the story could have happened.
There are multiple ways of creating titans out of humans, but a specific way of creating Titan Shifters.Castle Litgard/Utgard for some reason showed recent signs of human habitation despite being close to the wall. Considering that the lettering on the can of herring that Ymir found was of a different language and the Sasquatch Titan was concerned about language barriers, the food that Ymir found is likely to be a source from outside the walls and contains a trigger to turn humans into Titans. Also, the recent inhabitants were from beyond the wall.
Titans are the inadvertent results of research into immortality.May have some evidence, with Ymir revealing that while transformed they do not age. She is over 70 years old.
The purpose of the titansBased on these two posts on tumblr, there might be some additional info on why/how the titans were created. It does seem to be just a draft/prototype, but who knows, some of it may still apply to the manga in its current form. So, considering the information in here, the titans were artificially created, in this case by some sort of cult (probably the progenitors of the Wall Cult) who was worried about the environment. The purpose of the titans was to exterminate humanity and protect the environment, which is why the titans ignore plants and animals. And, it seems that the the titans 'absorb' people, unless they have a 'pure heart', in which case they can become titan shifters. However, regular people without that pure heart are instead turned into titans? This may be what happened to Connie's village
Titans WERE created to unite humanity...... but not by giving them a common enemy, as the legends suggest. Rather, Titans were created in an effort to remove all sources of human conflict and thus end war forever. Remember that the Titans first appeared after humanity had already crippled itself by terrible wars, which decimated the population. Now consider the Titans. They need no food, no shelter, and no material goods or tools to survive. They don't age and as they can regenerate most wounds, we can assume they are immune to disease. They have no means of natural reproduction (that we know of), and they don't attack each other. And finally, they are, as far as we know, mindless, and have no society. Each of those traits is a direct counter to a common cause for human warfare. With no need for food or material goods, there is no need for war over lands to be used for raising crops or gaining valuable resources. With no need for reproduction, there is no need to fight over family rights and breeding ability (though that is admittedly more a thing that animals fight over, but humans can do it too). With no minds, they have no ideas, and thus can't fight each other over differing ideologies. Finally, with no social stuctures, there is no chance of war between different classes or between the oppressed and oppressors. As it is mostly accepted that the Titans are transformed humans, we can assume that whoever created them made them as a means to transform the human race into a population that was above warfare. Titans are essentially immortal, and at the same time, their "pilots" are either unconscious, or dreaming. They were created as Lotus Eater Machines to simultaneously keep the humans alive (whoever created them was a Well-Intentioned Extremist who still cared for the human race, in a way) and stop them from warring. The Titans' only real flaw, the fact that they attack other humans, is simply the means of tying up loose ends. The Titans seek to destroy all the humans who remain humans: that is, those who are still capable of committing warfare. Once all of these who refuse to give up warfare are dead, the Titans will just sit around in peace, and humanity will be "preserved" without war. It's an Assimilation Plot writ large (and bloodily). As for where the Titan Shifters fit into this, either they are abnormalities that whoever started things didn't foresee, or they were created by a different process which other humans created separately in order to oppose the Assimilation Plot.
Titans were created to unify humanity but the plan was sabotagedThe titans were an attempt at solving two big problems at the same time. First they were/are an attempt to unify humanity peacefully. As stated in another WMG above, they have no need for food, no ability to reproduce, are nigh immortal etc... Except in this case they were always intended to keep their human sentience. The idea being that once the more basic needs and causes of conflict were removed from humanity the remaining ideological differences would be easier to solve. Also at the same time with the titans were developed for interplanetary/interstellar exploration, as being solar powered they make good exo-planet exploration suits. As they need nothing but sunlight they have no real limitations on where they can go. I'd bet the titans wouldn't even need to breath beyond the need to speak. Why send a rover unit only capable of mechanical analysis when one could send the scientist himself, capable of thought and making decisions on the ground? That was actually the first stage of the titan shift program. A group of astronauts and scientists were shipped off to explore a likely habitable exo-planet (or possibly one of Jupiter's moons) and test the hardiness of the Titan transformation. So the humans of this time had the advanced technology to make the titan bodies and at first they would be tested as a method of exploring other planets. This was successful and the early explorers being able to setup a colony on a more habitable planet (this being the origin of the walled city.) Then once the technology was proved safe the general populace would be made into shifters. However before the titan program was implemented among the general populace it was sabotaged by a dissenting group of some sort who made a few changes. After the sabotage rather than everyone maintaining self-consciousness when the titan change was implemented only those with extreme will power or an immunity (natural or acquired) to the change made in the titan shift could maintain their self-consciousness when shifted. Secondly as well as the loss of high consciousness there was programming put in that forces the mindless Titans to attack and kill those humans as of yet unchanged (or titans unaffected by the sabotage) so as to prevent this sabotage from being undone and or to keep the chaos mounting to allow this extremist group more time to enact further plans. This modification explains the differences between the shifters, the aberrants and normal titans. Shifters are clearly those humans with an immunity to whatever change was put in the titan program. Aberrants would be those people who had enough willpower/immunity to maintain partial control of themselves but not full consciousness, thus why their attack patterns are less predictable. But still so far gone that the aggressive human killing programming and general loss of consciousness to have effect. Whereas normal titans are simply the majority of humans without the ability to resist the changes wrought in what was to be one of humanity's crowning achievements in bio-engineering. Though as seen it is possible with time for a person to gain the willpower needed to change from a normal titan to a shifter. So it was only after the titan program was implemented on a wide scale that the changes were noticed. Humanity did it's best to control the beasts they had made of themselves and when that failed attempted to eradicate those titans that they could in an attempt to save those who had witnessed the changes and wisely decided to not titan shift until it could be fixed. Unfortunately they were sabotaged again and this time were forced to leave earth in favor of the colony that had managed to place. But the saboteur group that had made the initial changes to the titan program had moles in place too (the precursor to the wall cult) When they landed the colonist decided that they would abandon earth for the time being until they could fix the problems with the titan change (the resetting of the calendar 850 years ago) as it would be a fairly simple matter to fix those already transformed once they had solved it. As the colony was started a large portion of those moles embedded in the colonist were discovered and either fled or were kicked out by the rest of the colonist (Explaining our shifters from beyond the walls) with only a few of cleverest being able to maintain their cover. Who then cut off from the main group evolved into the wall cult on the inside unable to maintain contact with their exiled kin until long after the colonies were founded. The reason this is unknown to present day inhabitants is centuries of cloak and dagger actions bent on hiding and destroying the truth. Humanity is now so far degraded in its scientific and technological prowess that it will be centuries if not millenia before it regains it's abilities and can return to earth which will by then be a long forgotten legend
Titans are dead people, brought back by a science project and resurrected.In the past, a great war was mentioned. The higher ups in that war tried to discover a way to bring their lost soldiers back to life and fight for them again. They succeeded but the result was the titans, mindless creatures that didn´t saw the difference between friend or foe. To make sure that a injection would not be necessary the Titan shifting was turned into a added formula that spreads through the titans saliva and bites. They turned to their creators and forced mankind into the state we see them as now. Titan shifters are a result where the dead person finally is fully resurrected and reverted to its human form. Doctor Jeager re-discovered the original forumla, tweaked it and injected it into his son as a last desperate effort. His basement contains the research notes and true history of the war. Also notes of how to produce the formula which he perfected in his occupation as a doctor. He entrusts Eren to give Humanity a chance to fight back against the flawed creations and the Higher ups that chose to titanify and regained their senses that way. (Ape titan) The Ape have the formula and is using it to create decoys for its true objective. He is an outsider who invades like a general of war. sacrificing his troops without any concern or remorse. He might be one of the original shifters from a time before the walls and have knowledge of the war. The BAR is working for the opposite side of the war, their higher ups are just as cruel as the Ape titan. That´s why they are afraid of failing. All while the mindless titans continue their war-programmed mission. "Kill all humans." Like a machine without any regard of what they are doing is right or wrong.
The Titans were NOT created by humanity.At least, not entirely. Why? A couple reasons. A: It's just waaay too obvious. Sure, Annie being Titan Chick was obvious too, but this is Myth Arc -level stuff we're talking about here. B: People are constantly talking about how Titans are humanity's "natural predators", and the narrative frequently seems to almost say that they're inherently superior to humans. None of that makes sense if they're just a failed (or worse, successful) experiment. B: They're just wrong. They feel so alien, particularly the furry guy. Something about their origin just pretty much has to be organic and otherworldly in nature, rather than just being some accident. In any case, this business of unity in the face of a common foe means that to some extent, humanity (or, actually, perhaps some alien force working toward human unity...actually that makes a whole lot of sense...okay I'm continuing this down in the next one after I finish this WMG) probably was responsible for the current state of the world, perhaps causing the humanoid Titans, while the apes were the originals.
The Titans were created to unite humanity, but not by humans.At least not the humans in the series. Given the confusing nature of the whole "in 2000 years" thing when it doesn't appear to be a post-apocalyptic Earth, it seems possible that the people behind the Titans are in fact future humans from Earth, who created the Titans in an effort to force the presumably stagnant society to evolve. Eren and company, meanwhile, are either Human Aliens or the descendants of colonists or something. Of course this means that Future Us are either well-intentioned extremists or the Titans don't actually kill anyone, but rather teleport people to Earth or something and replace them with dummies or holograms that are then messily torn apart.
The Titan / Human livestock metaphor is backwards.The Titans were created out of humans to be the perfect livestock - the require no food, are immortal, and any meat you slice off of them grows back. They are the perfect food and the solution to humanity's hunger. The reason for the titan motivations is basically payback - the people turned into giant buffets either consciously or subconsciously fought back against being turned into giant cows and fight back by attempting to eat humans in a bit of irony. Knowledge that this is how the world was "supposed to be" is also the motivation among the Titan Shifters attempting to end humanity.
The Titans are an Environmental Response to HumansWhen you look at them, the Titans seem perfect for the purpose of protecting nature from humans. They don't die, they don't devour other animals or plant life, they can't accidentally overpopulate and once the last human was gone they wouldn't do any damage to anything else.
Theories about the Titan Shifters
Theories concerning Reiner, Bertolt, Annie, and Ymir.
Annie was Berrick's replacementWhen Bertolt, Reiner and Berrick were attacked by the mindless Ymir, Annie was nowhere to be found. Yet we know that she was there at the original wall-destroying operation, using her limited ability to summon Titans to maximize the death-toll. It seemed that the campaign had three distinct roles; a wall-breaker big enough to destroy the cannons and smash the strongest outer wall, a second breaker to destroy the inner gate and someone to ring the dinner-bell so to speak, for the Titans. Annie fulfilled this last role, but who says Berrick wasn't the original person selected for the mission? Another bit of evidence to back this up is that, regardless of Bertolt's crush on Annie, it's clear that Reiner and Bertolt don't know Annie as well as they do one another. It shows signs that she's sort of a "spare", a person they weren't trained with and had to add at the last minute.
Theories on the Titan's motivations.Yes, this includes the human titans. Why do the giants feed off of humans when they clearly don't need to in order to survive? Why wipe out all humans, who've been living rather peacefully within the walls? Because they were picking off weaker titans outside of the walls? It's been made clear that the human titans see them as nothing more than tools for their goals to wipe out humanity and get Eren back.
On "Ymir-Sama"'s origins and the Talking TitanBuilding on the theory that the walled city was built as a compromise between the humans and the mysterious leaders of the Titans and that there have been multiple mass human sacrifices in the past, would explain some of their relation. Right before she turns into the Dancing Titan Ymir says/thinks that she "died for the happiness of a great number of people but was given a second chance" and that she was "hated simply because she was born". A large part of her attraction to Krista/ Historia is due to that shared trait. Ymir could have been the illegitimate daughter of a noble family offered up as part of a mass sacrifice to the Titans (or not even a noble family; an illegitimate child would be a shame for a commoner just as much as a aristocrat). By some lucky chance, she managed to steal and inject herself with whatever creates Titans. Unfortunately she bit off more than she could chew as she spent sixty years as a mindless Titan. If she is from a noble family, it could be that she had a loyal retainer or butler of some kind who volunteered to go with her to her death and she took the chance to "save" him as well by doing the only thing she could, injecting him with the same serum, making both of them mindless Titans. It would also explain why the Titan was tearing at its face; it was trying to resist the urge to eat what it thought was Ymir, thus its stricken expression as it chews on Illse. On some level it is aware that it is eating the person it was supposed to serve/take care of.
Speaking of Ymir...There is one character named Ymir, and she turns out to be a more benevolent Titan shifter. Is it a coincidence or is she the leader of some titan-turned-human race or something?
Reiner, Bertholt and Ymir all know the Sasquatch Titan.An entire frame is dedicated towards their reaction on seeing it. Considering their backstories, this is not entirely impossible.
Ymir is Titan royalty, or what passes for it.This one's probably fairly obvious, but Ymir seems to have a pretty good grasp of Christa's situation, and she also seems to think they have a lot in common... but they really couldn't be more different, except for their one conversation about their names.
How Titans-Shifters form Titans out of nowhere
Annie, Reiner, and Bertholdt are not the only agents living within the Walls.Regardless of how powerful they are, it seems unwise to leave three children to their own devices for five years. Reiner also sounds pretty confident that Eren agreeing to come with them will end the attacks, something he probably wouldn't be able to decide completely on his own. Beyond that, Annie was living in the Inner Districts as a member of the Military Police, while the other two were living near the edge of civilization with the Scouting Legion. Coordinating their plans would be much easier if they had others to serve as messengers between them, nevermind that their orders changing would require them to have someone with authority acting as their handler.
Annie was not the one responsible for Marco's death.Bertholdt was the one that actually did it, and Annie was merely the one that ended up using his stolen gear. Annie is shown to have hesitated to almost dangerous degree when it came to attacking her former comrades from the 104th, and is visibly bothered when asked how she ended up with Marco's equipment. Reiner also ended up helping the 104th during the battle of Trost, shooting their whole mission in the proverbial foot in the process. On the other hand, the most recent chapter shows that Bertholdt has a complete Lack of Empathy when it comes to anyone outside his own group. Not even Eren gets an ounce of sympathy from him, and he was in the end the only one to fully carry out his mission without fail. As such, he seems to be the one most capable of killing one of their classmates in cold blood if necessary. Annie was simply the one assigned to carry out the destruction of the two test subjects, possibly because she wouldn't stand out as much as super-tall Bertholdt or built-like-a-linebacker Reiner. Her build is perfect for blending in, and wouldn't allow them to have any sort of defining traits to look for when searching for the culprit.
Reiner's dissociative episodes are the result of the battle of Trost.During the battle, Annie and Bertholdt both follow his lead. Annie is an established lone wolf, and probably wouldn't have asked him what their next move would be, if she had even suspected him of being psychologically compromised. But we see very clearly that the battle, and the cleanup afterwards deeply effected both Annie and Reiner. For the first time, he was forced to truly confront what their actions would cause, as they watched their classmates being Eaten Alive and later had to gather up the remains for disposal. Such an experience would be traumatizing enough, as shown by Jean's Character Development. But Reiner had the extra push of being partially responsible for all that suffering and death, to people he actually knew. Annie leaves within the next few days to join the Military Police, and continues to trust him to handle providing her with information and assistance. Again, I cannot see her relying on him if she'd suspected him of having bouts of crazy. Likewise, in the aftermath of their first battle, people probably wouldn't even notice if Reiner started behaving strangely or was having problems with his best friend. Anything unusual would be written off as him simply being a Shell-Shocked Veteran, as opposed to a villain being crushed by guilt.
Sexuality is meaningless among Titan-shifters, and Reiner isn't bisexual at all.Sex doesn't have any biological meaning to a race of creatures that can't breed anyway. They're clearly capable of love and caring and possibly even of sexual desire, but culturally and socially, sexual orientation isn't any more significant than hair or eye color (maybe even less so, if Ymir's dark hair and freckles are any indication). Reiner isn't bisexual: as a Titan-shifter, he's gay, but his human other-consciousness is straight, because that's more typical of humans. His crush on Christa is his mind's way of reconciling the conflict between his loyalty and belief in humanity and his mission as a Titan-Shifter spy.
Ymir's People know how Titans are made, and may be able to turn them back into humans.In the Ilse's diary sidestory, the Titan that finds her seems to be mistaking her for Ymir. But when Ilse starts asking questions, it just groans as if it's crying, bending its head to her as if supplicating and tearing at the skin on its face. Maybe it understood what she was asking, and couldn't answer because it was cognizant enough to be ashamed of itself, knowing something is Very Wrong with it, and by prostrating itself before "Ymir-sama" it hoped she would cure him. It eats her only when it realizes she isn't who it thought she was, and doesn't look anywhere near as happy as most Titans are when they're having a snack...
Annie and Reiner are artificially-made Titans; Ymir and Bertholdt are not.Bertholdt doesn't seem to be unique in his Titan form, if all the other Titans in the walls are also Colossal Titans like he is, and Ymir is apparently a member of her own Titan-shifting people, but Annie and Reiner are fairly singular: for one thing, they both have strongly gendered appearances, they're both blonde, and generally resemble their Titan forms much more than the other two do. It may also explain Bertholdt's coldness where Annie and Reiner show some care for their fellow soldiers; going by Ymir's conversation with Christa about not being what others want, she may be rejecting the same approach Bertholdt is taking on principle.
The village the Titan Shifters come from is a village populated......by former Titans. Chapter 47 shows that Titan Shifters happen when a Titan comes out of the dreamlike state and becomes human again. It's happened more than just with the Shifters we've seen, and so they have a refugee village out there somewhere.
The story Bertolt tells Eren and Armin is mostly true.He merely lied about the when and where. And the reason that he states he doesn't remember what happened after seeing the Titan at his window is because he was telling them about the day his people were turned into Titans. The reason Reiner and Bertolt immediately recognize the Ape Titan is because he was there that day, and had a hand in their transformation.
Reiner lied when he claimed that exterminating humanity was their original goal.The destruction of Wall Maria and the attack on Trost were merely a means to an end, not the actual goal. The original attack was merely a diversion, to allow the trio to infiltrate without trouble. It may have also been done in an effort to bring the Beast Titan out of hiding or awaken him, accomplishing one portion of their mission. Since they seem to believe the "Coordinate" is a person, or a person will help them find it, exterminating humanity completely would be detrimental to their goal since they risked killing the very person they were looking for in the first place. Of course, there's always the possibility that the trio were unaware of the full nature of their superiors' plan, considering Ymir calls them "small fries" and suggests killing them won't accomplish a thing.
Why the Titan-Shifters are also targeting normal humansGiven the practically-confirmed idea that normal humans can be transformed into mindless Titans, the goal of the Titan-Shifters is to wipe out the source from whatever direction possible. Titan-Shifters can be assumed to be immune to whatever the apelike Titan does to transform other humans into Titans, and they are still targeted by the mindless Titans. Somewhere there's a settlement consisting entirely of Titan-Shifters, and their ultimate goal is to take out either the ape titan, the humans he's capable of transforming into mindless weapons, or both.
Alternate reasons the Colossal Titan let the mindless Titans in...
The Titan Shifters are out to destroy current humanity in order to protect the future of humanity that Titan-kind represents.As long as the Walled City exists in safety, there will always be humans to continue fighting the Titans; it's an extremely slow battle, but if Titans don't reproduce on their own until after they've changed back, and changing back could take centuries, they're eventually going to whittle the population down. People like Levi and Mikasa might only come around a few times in a generation, but that's still tens of Titan losses each, and those numbers don't get replenished. Since humanity has proven that it'll never completely give up the fight, wiping them out is the only way to ensure that the Titans will live long enough to become themselves again. Of course the Titan-shifters would focus on saving the potentially billions of future-Shifters, at the cost of comparatively few ordinary humans.
Titans become Titan-Shifters by eating humans who share their blood.
Annie's father told her to hate the world before she ate him.Adding to the above: it's a cruel world indeed that would make a child eat their parent in order to become strong enough to change it.
Bertolt has the greatest limitations on his Shifting abilities.While Eren's inexperience results in him being in a weakened state after transforming, he's still able to do it more than once per day. The only Shifter thus far to not be shown transforming more than once in a single day? Bertolt, the Colossal Titan. Even when he and Reiner are very possibly about to die, he makes no efforts to transform and instead relies upon Reiner's protection and his damaged 3D Maneuver Gear. More than likely, the Colossal Titan is such an extreme transformation that he has very limited ability to use it. When wounded and exhausted, he's only shown performing a partial transformation and he's never been shown to maintain it for more than a few minutes at a time. As such, it's possible that while he retains the stamina necessary to function after changing back, unlike the other Shifters he requires a much longer cool down period between transformations than any other Shifter.
The Titan Shifter faction that Annie Bertolt and Reiner are a part of is in really bad shape.
Annie, Reiner and Bertoldt are not their real names and they have Norse Giant names like YmirBertoldt could be Bolthorn (frost giant and grandfather of Odin in Norse mythology) for example.
Titans and Titan Shifters are the curse/reward of the God(s) of their world.Using the anime for reference, every Titan-shift is represented by a Shazam! styled lightning bolt, all followed by one common element- a blood sacrifice. Taking it literally, it would mean that the person who can titan shift would need to give up blood in order to transform, but let's take a look at this a little deeper. Eren, being the protagonist, is the face of the whole theme of the story: stop being complacent. Although his titan shifting abilities *may* be artificial, the underlying principle is the same- he is willing to pay, to give up something, to use the Titans' power. The problem he had when he tried to transform against Annie the second time was that he refused to accept that Annie was the enemy- he refused to give her up, thus he could not 'pay' the price to the gods. The blood sacrifice is symbolic in the fact that the titan shifters are willing to do whatever it takes to accomplish their goals. Ymir claimed she stole the Titans' power, she took it without paying for it. She had not 'earned' it, thus the mindless titan she was for at least 60 years. Ymir thought she was being clever, yet whoever was watching over the world caught onto this and, like all humans who are not willing to pay for something, Ymir was punished for her hubris. During her endless nightmare, she would eventually find a way to prove she was finally worthy- finally willing to give up everything just to get what she wanted. Thus, the curse was lifted and she was given the blessing.
Annie, Reiner and Bertholdt are all completely in the dark about the Wall Cult and the Military Police's attempts to sabotage the Survey CorpsSomething is just bugging me about this. When Reiner and Bertholdt were talking with Ymir, they pretty much spelled everything out. They talked about the Coordinate, their village, how their mission was to wipe all of Humanity out and how Eren's existence could change that mission. Not once did they ever bring up the wall cult or the Military Police. Even Annie, who was part of them, seemed unaware of what her superiors were up to. I mean, if she had known that the Wall Cult was gunning for Eren, wouldn't she had told Reiner and Bertholdt right away? And wouldn't the two of them saying that it wasn't safe for Eren inside the Walls BECAUSE of the Wall Cult be an excellent argument for why he should've gone with them? Just like how the Wall Cult is keeping the Survey Corps in the dark about the Titans in the wall and so many other things, Annie, Reiner and Bertholdt's village could be keeping them in the dark about what's going on inside the wall.
Annie isn't a Titan who became a Titan-shifter; she is a girl who was selected to BECOME a Titan-Shifter.The same may go for Bertholdt and Reiner, but it explains the similarities between Eren's transformation and her own (strongly gendered appearance, traumatic childhood scene with terrified father pleading as if he isn't going to be there much longer). The people of her hometown chose her to take the same injection (or a similar one) that Eren did, which would cause her to eat her father like he did, for the sake of the plan to infiltrate the Walls. It also makes sense, because Annie could summon normal Titans to come and eat her body. She's a failed Coordinator.
The Titan-Shifters had to look for the Coordinate/Coordinator within the Walls because the materials that give the Coordination ability had been stolen from them.Grisha knew that the coming of the Colossal Titan and the breaking of the Walls to let the Titans in meant that there would be spies, because he knew what Titan-Shifters are. He made Eren a Titan-shifter because he needed the Coordination ability to go to someone he knew would use it for the sake of humanity.
Shifters don't have the ability to turn into titans.They have the ability to turn into humans, and this is what Ymir stole. More specifically, we've seen three things associated with a shifter's transformation:
The Shifters are HeroAntagonistsI have a theory under the Beast Titan sections explaining that he's their enemy and the story's Big Bad. Expanding on that, it appears they're only trying to destroy the walled city to stop him from wiping out not only the humans within but every human on the planet, and to prevent the creation of more Titans. The reason Reiner is so worried that Eren can control Titans is because he knows Titans are really humans, and Eren's genocidal hatred will cause him to murder innocent people trapped in Titan form. They've also tried to get Historia to come with them, implying that they don't know the origins of the walls, and need that information to stop the Beast Titan. Annie encouraged Eren to question the status quo because they're aware of the government conspiracy providing the Beast Titan with more humans.
Annie's crystal prisonIs actually a form of Titan, with the same effect as the majority of Titans' forms. We know that Titans are a form of Lotus-Eater Machine that keeps their pilot trapped in a dream world. We saw Eren nearly get trapped in that fantasy of him in his house with his mother still alive. We also know the pilot doesn't age physically while a Titan. The crystal performs the same function of keeping Annie ageless (hence how she's alive at all), and based on her flashbacks, she's retreated into a dream where she's with her father at their homeland.
Theories about Grisha Yeager.
Theories about Dr. Yeager and his research.
Grisha was the Coordinate, and he got cold feet.Seeing the destruction of the Walls and what it cost him personally, he backed out of his role in the Titan Shifters' plan at the last minute, and may have injected Eren as a last-ditch effort at siding with Humanity.
The injection Eren's father gave him is not what gives Eren the ability to titan-shift, but what lets him keep his wits when he does so.All humans (or some humans for some other reason) are able to titan shift, which is hinted at by Connie's "mother" he found in his "destroyed" village.
Grisha had a role in the conspiracy, but turned against it because Carla was killed.The basement is full of his collected knowledge of the conspiracy between the Wall Cult, the Royalty, and the Titan-Shifters. He was aware of all of it and was either playing, or was meant to play, a role in the proceedings, possibly without his knowledge. His superiors called him away from his hometown because they knew it was going to be attacked when the Colossal Titan arrived, and something about the Shifter infiltration was too important to interrupt by leaving a man with the resources to route a Titan attack (the Coordinate/Coordination ability in a syringe) available to do so. In other words, he was called away for the same reason that the Scouting Legion was! He injected Eren to make him a Titan-destroying machine who could serve as an instrument not only of humanity's revenge against the Titans, but his own revenge against the puppetmasters who killed his wife.
Eren ate his father, but doesn't remember doing so.In Chapter 53, Hanji relates the experiment results to Eren. When titan!Eren was writing on the ground, he communicated something along the lines of "My father...to me." We know Eren has "episodes" when it comes to remembering his father, lending credence to the hardly-a-theory-at-this-point that Grisha has a Memory Gambit in the works (he does mention "their memories" will help you at one point). "My father injected the Coordinate to me? My father gave the Titan-shifting power to me?" Either way, something happened that night — and after the initial injection, Eren is unable to control his Titan form and eats Grisha. It would explain why nobody seems to know where he is, despite him being a distinguished doctor, and why Hanji notes Titan-Eren grieves immediately after writing about his father...because human!Eren repressed the memory, but not fast enough to repress titan!Eren.
Eren is so important because his father ran off with all the research on Titanshifters. Ymir and her people are the original Titans that all further research was based off.After the discovery of Titanshifters, Dr Jaeger ran off with the remaining formula and all of his notes. Eren is so important since he's the latest "model" as it were and someone talked about the key around his neck. Many of the Titanshifters were close friends and comrades of Eren and at the very least, they may have heard rumors that he knows how to access his father's work. The Titanshifters also seem keen on acquiring Ymir who is patently unaffiliated with them, mainly because she may be a live sample of the original Titan or Titanshifter line.
The plague that Dr. Jaeger saved mankind from was the agent that makes Titans and/or Titan-Shifters.The Titan-shifters either are, or are descended from, people who were exiled because they had or carried it. The Sasquatch Titan is basically spreading a disease, one that Grisha was able to identify, but not cure: the closest he could come was a vaccine, which is what creates Titan-Shifters. They're immune to becoming regular Titans because they can willingly become Titans! Grisha already knows that whatever Mikasa's got going for her will protect her, so his last act before fleeing the Walled City was to immunize his son.
The serum Eren's father injected him with is the perfected formula of what originally created the Titans.As the Rogue Titan, Eren is pretty much a unstoppable killing machine, utterly annihilating Titans left, right and center, and not even slowing down when he loses a limb due to astoundingly fast regenerative capabilities. He can even match the Colossal, Armored and Female Titans blow for blow. So why does his form have absolutely perfect physique and performance? The serum his father injected him with is the perfected version of what created the Titans. Whatever the Titans, it is highly likely they were originally human at some point, further confirmed with Ymir and the titan in Connie's abandoned village. The malformed and mentally retarded Titans may have been test subjects for a serum designed to turn them into supersoldiers.
Grisha was studying memories, not Titans, and discovered the concept of Titan-shifters by accident.The concept of memory seems to come up a lot: Eren "remembers" Mikasa's hair being short, he knows how to trigger his Titan transformation but doesn't know how he learned, he gets lost in his dream of home and has to remember the real world to get out, Grisha even talks about "their memories" when he injects Eren. It's possible that he found a way to take memories from people, and just happened to get a sample from a Wall Cultist or Titan-shifter, learning about the possibility of humans that become Titans. Injecting Eren with literal memories of that concept gave him the necessary knowledge of how to change back and forth.
Eren is a titan because his dad is too.
Eren ate Grisha.Grisha was, presumably, alone with Eren when he injected him and turned him into a Titan, but what do Titans do on instinct? They eat humans, and Grisha would have been the only one around! Following that...
Beast Titan Theories
Theories about Monkey Trouble himself.
The Beast Titan is the Big Bad behind everything.This is linked with the supposedly leaked story behind SNK, which (MAJOR SPOILER) talks about a professor creating titans to exterminate humanity because he thought they had become too religious (a group of religious zealots were against his researches and tried to kill him, but ended up killing his family instead). As a result, he created the mindless titans, but also gave himself and a group of chosen followers the ability to become intelligent titans. Going out from this, the Beast Titan is the professor in his titan form, which explains why he talks, can create other titans, and has an intelligence rating of 11/10. The spoiler also mentions that he's unaware of how humanity managed to secure themselves somewhere, so it makes sense that he didn't know about the 3D maneuver gear. It also makes it Fridge Brilliance as to why his titan form looks like an ape. Everything started because of a war between science and religion, and one of the things several religious people do is to refuse to believe that man originated from apes, basically meaning his titan form is just a huge "Fu*k you" to religion. This is all based on whether or not the leaked story is true however.
The Beast Titan is Gaias Revenge.It is in fact humanity's true enemy, but it doesn't want to wipe them out, per se. It's a being that knows that humans could potentially overwhelmingly overtake the planet if not kept under control, so it has the ability to turn humans into the ultimate population control mechanism, as well as something completely harmless to the environment: a creature that does not care about attacking animals, needs only sunlight to survive, and will only consume humans. It decided to sneak into the walled city when it looked like the Titan Shifters, who lacked their protection, were going to allow humanity to spill into the world be destroying the walls.
The Humans that can turn into Titans were intended to be weapons against that "Thing"In chapter 35, a Sasquatch like creature appears. It is nothing like the Titans seen in the series thus far, and it even defies the standard height limits of normal Titans by being 17 meters tall. Given its command over the Titans, it is still affiliated to them, but not them. To top it off, it KILLS a Titan that does not listen to him. Perhaps that "Thing" is one of the creators of the Titans, and possibly one of "Ymir's People".
The Beast Titan is a Shifter too.While it does seem impressed on how humans created the 3D Gear, he could still be human, just from another part of the world.
The Beast Titan is Eren's fatherThink about it for a minute. He was able to remain calm and acted out of curiosity when it came to the 3D maneuver gear. He also didn't like the fact he had to kill a fellow titan to keep Mike alive when interrogating him- although not to the degree of a father being heartbroken over killing his own son, he would have still killed one of his own creations. The timing is also too much to be coincidence.
The Sasquatch Titan is humanity's true enemy and can turn normal humans into titans:Judging by chapter 46, it seems Reiner and Bertholdt true objective was related to the Sasquatch Titan. When Reiner told Eren about their identity, he said they wanted to destroy every human living inside the walls, but now everything changed and they are willing to let them live, as long as Eren goes with them. The reason everything changed is because they saw the Sasquatch Titan, which was their primary objective. See, normal titans are dangerous to titanshifters as well. And judging by Connie's village, it's safe to assume normal titans used to be normal humans. It would be a problem to the titanshifters kind if every human alive turned into a titan, something the Sasquatch Titan could do. They knew he could do it, as he was the one who created the first titans, but didn't know where he was to hunt him down, since he was probably hibernating or something like this, as he was not aware of mankind's 3D maneuver gear. As they couldn't kill the titan who could create more titans, they decided to kill every human being instead, preventing them from ever transforming. But now that he is awaken and started the cycle again, their objective changed.
Theories on Beast Titan.It probably experiments on humans because reasons unknown to reach some unknown goal. Maybe to restore his own kind since it is the only one of such type we saw by far.
The Beast Titan(s) will come back with a counter-measure to the 3DMG.That bit about humans needing a common enemy to unite against isn't just flavor-text for the setting; it's foreshadowing. The Titan-Shifters and the Humans will be forced to unite against the Sasquatch Titans.
The Sasquatch Titan is Eren's Dad
The Beast Titan is a natural titan, distinct from the rest.We now know of the Beast Titan, it looks like a massive ape with long arms and is incredibly strong, eloquent to the point of understanding and speaking human speech, and even gives lesser Titans orders. But it isn't a Titan Shifter. It is a genuine Titan. The Beast Titan might be the remnant (or vanguard) of a natural born race of Titans, which Humanity discovered shortly before their near-extinction living in remote areas. They may have experimented on them,drawing plasma from them and testing its capabilities in humans, possibly in the hopes of creating a super-soldier or virus. From there, the first batch of subjects exposed to the serum would have malformed horribly, to the point of their limbs becoming disproportionate and their size increasing, all the while their mental faculties are completely erased except for their desire to kill the enemy. They spread, able to expand their numbers by eating enough people to form a new Titan, causing the near-extinction of mankind and making them flee across to sea to presumably Europe, and discover the walled city. The Beast Titan may have resurfaced as the last of its kind to enact its retribution on Humanity.
The Beast Titan is humanity's harvester, and enemy of the ShiftersThe Beast Titan is responsible for harvesting human beings (provided to him by the conspiracy within the government), transforming them into Titans as weapons against the Shifters' faction. This fits in with the whole "humans as livestock" theme. The reason the shifters sent three kids in to destroy the wall is because they're on the losing side, short on manpower, and need to cut off the Beast's source of Titans, then win by attrition with their ability to reproduce naturally. Reiner and Bertholdt were trying to capture him as an alternate way to eliminate Titan production, since if it was on their side, trying to capture it makes no sense. BT's test of humanity's strength was really just to see if the people within the walls are a credible threat compared to the Shifters. They aren't. To fill in the rest of the gaps, I'm betting "Ymir's people" are a group she shared the "Titan's Power" with after stealing it from the shifters, and Grisha was a part of the conspiracy working to undermine it by obtaining Titan Shifting for the people within the walls to protect themselves.
Unique theories! Crossovers, crack, and assorted other random stuff!
Eren and the CoordinateIt seems likely that the substance Eren was injected with was NOT the Coordinate. Rather, it was what made him a Shifter. Why? First of all, Mikasa. There's enough evidence to suggest that her abilities are tied to Eren's nature, given the constant brain flash montages during the fight with the kidnappers, as well as just before Titan!Eren makes his debut. Remember, Mikasa's rescue took place before the injection. Presumably, anyway; it's hard to tie down the precise timing of these things since all we have is a dream sequence. Also, remember Grisha's words: "Get to the basement. This power will help you then [...] their memories will help you use it [either Coordination or Shifting]." Grisha just made him a Shifter to ensure he would survive long enough to be able to use his innate Coordination abilities. The bit about memories is a tad more ambiguous. It could mean that the memories of other Shifters somewhere, which he could access with his mental link due to being the Coordinate, would teach him how to Shift. This has some evidence backing it up, like Eren not understanding how he knows to bite his thumb...
The nature of the Wall CultIt's been long assumed that the Wallists were part of the internal conspiracy, but I'd say that as of right now that's pretty well Jossed, given Nick's fate and how his character was generally portrayed. One possibility is this, going from the assumption that Shifters were created as a weapon by humanity: when the first war ended, humanity agreed to remain trapped within a prison, and to destroy their Shifter army by killing them and using them to create the walls. But they lied. Instead, the Shifters were kept alive, but dormant, waiting for the time to come, and the Wallists were founded to watch over the army and keep it a secret from Sasquatch and co. That's why they're so terrified of "desecrating" the wall, and why they refer to the walls as a gift from God to save them from the Titans: they ARE humanity's saviors, just not in their current form as walls. And if the Shifters were to wake up prematurely, the Titans would learn the truth and destroy humanity once and for all. The only remaining questions are A. who IS the enemy within the walls, and B. what are the motivations of the Hometown Trio and their allies? They don't seem, as I once speculated, to be affiliated with the Wallists, or Annie would have been careful not to damage the wall as she did. But their goal is clearly not to outright attack or destroy humanity, because that would have been trivially easy: destroy Shinganshina, destroy Trost, destroy Stohess, humanity's done.
The Walls are a three-layered Transmutation CircleWeird cult, government conspiracy, super-powered humanoids... it all fits!
Mikasa kicks so much ass because...We are told in the story that she is the last person with Oriental blood in the world. Her name is clearly Japanese. Her mother, in the brief time we knew her, told Mikasa that her family has skills that have been passed down for generations. Conclusion: Mikasa is a Ninja descendent. Therefore, she is the last ninja in the world, and thus, she is THE walking, talking incarnation of Conservation of Ninjutsu to the extreme.
Mikasa is not a ninja, but...She is a descendant of Ryuu which would give her blood of Hokuto and (possibly) Nanto
Additionally, the reason why Asians such as Mikasa are valued so much by slave traders is.....that the ancient Asian race and arts of Ninjutsu were once considered by the Government to be the last hope against the Titans. The development of 3D Manoeuvre Gear and its arts of leaping around through the trees and rooftops were more clearly inspired by Ninjutsu, rather than the classical European style of building bigger cannons and bombs and winning through brute technological force instead. The original plan wasn't to sell Mikasa to just some rich perverts, but rather for a Super Breeding Program. The aristocracy took note of this and thought that the Asian Super soldiers are going to replace the old useless European race, and thus these "rich perverts" wanted to kidnap and breed with Asian women so that their aristocratic property is still preserved even when those bloodlines have Asians with them. Eren interfered with the kidnappers' plans, and the Titan-shifters provided an alternative to the supersoldier program.
Master Xehanort is the real villainHe personally trained all the Titan Shifters. We see it happening first hand at the start of the series!
The series takes place in the future of Ao Oni
This world is in the same universe as Tengen Toppa Gurren Lagann
Titans are Witches/Warlocks and/or their Familiars.Surprised that one hasn't come up yet.
Mikasa and Levi will turn out to be human-sized titan shiftersWith miniature 'pilots' in their neck. And Eren will discover Mikasa's 'pilot' after she seemingly got eaten by a titan and carry her in his pocket for a Crowning Moment of Funny.
Shingeki no Kyojin is a sequel to WatchmenThis is based on Isayama's statement that Erwin and Levi are inspired by Ozymandias and Rorschach, respectively. Yeah, I'm pretty sure he only meant in terms of character design, but stil, it's fun to speculate. Warning, spoilers for Watchmen abound. Ozymandias' plan with the squid failed to create world peace. People quickly forgot about it; the threat wasn't constant and deadly enough. Undeterred, Ozy created a new monster that would more actively attack humans, existed solely to attack humans, and could spread across the entire world. Thus the Titans were born The first Titans were more beast-like and intelligent, such as the Beast Titan, but eventually Ozy discovered a way to create Titans from human beings. The Titans were a resounding success—too successful. The Beast Titans rebelled against their creator and began creating human Titans of their own, at a much faster rate than Ozy had intended. They decimated humanity before humans could get a chance to truly unite against them. Realizing he'd made a mess of things, Ozy used genetic engineering to keep himself young and immortal, and lived for centuries trying to come up with a solution to the Titan problem. In this current era, he is living as Commander Erwin Smith of the Survey Corps. And for help, since he can't do this alone, he created a clone of Rorschach using Rorschach's genetic material, and that clone is Levi. Levi doesn't remember being Rorschach and has no idea Ozy created him, which is all the better for Ozy/Erwin. He just needs Rorschach's skill at cutting things up and cold-blooded killing. I don't know if the Shifters are something Ozy/Erwin is responsible for, too. The series will end with Doctor Manhattan deigning to return to Earth and fixing the Titan problem with a deus ex machina.
Heterosexual People Cannot Become Titan ShiftersYmir is a lesbian, Bertholdt and Reiner are bisexual, Eren is asexual, and Annie could be any of the above, considering her lack of romantic interest in anyone. This is why Dr. Jaeger didn't choose Mikasa to become a Titan-shifter, despite her being smarter and a better fighter than Eren; she's straight. Likewise, all of the normal Titans we see are straight people, who can never become shifters.
Attack of Titan takes place in the same universe as Judge DreddEveryone is living in the ruins of the old world after everything got nuked to hell in massive cities. The people in the Walls is another city except they forgot about the past and regressed technologically/or the government is lying and repressing them. The area the story takes place in was hit less hard by nuclear bombs and is thus able to support life again, compared to the wastelands of Mega City-One. The Titans are a new breed of mutants that have a hatred of regular humans from not letting them in hundreds of years ago. So everyone wants to leave the walls of the city in Attack on Titan because it can actually support life, the order of the wall though know the ugly truth though that although their area is nice the rest of the world is a wasteland.
Armin is He-ManPossibly his parents returned back to their planet. When he was old enough his parents took him and raised him to be Prince Adam.
The Titans have another weak spot besides the base of their necksIn chapter 9 Reiner makes a comment about shoving a sword up their asses, as it's the second of only 2 weaknesses they have. Of course, we haven't actually seen that happen, so for all we know it might actually work.
Titan shifters have no genitals in their human forms as wellThere are currently 5 titan shifters we know about. Four out of them prefer to hide their abilities, and therefore will not mention this fact. The fifth one is Eren, who is young enough (15) to have never seen a naked human before. This is also why Eren ignores Mikasa's advances, and why Ymir only expresses her feeling towards Historia by touching her cheek. Titan shifer love is platonic, they can never get past innocent fondling. One problem with this theory though, in many armies, there are shared showers, which would have been a chance for Eren to see another naked male, or vice versa. It is however possible that customs are different on the SNK world.
Titan origins, most of the Humans outside the walls didn't get killed by the Titans and were used to farm the Titans today, The three goddesses of the Walls are the villains and the Wall Cult is to keep this a secret, and Grisha Yeager is the Beast Titan
Normal Titans eat humans in an instinctive attempt to devour a Shifter in order to return to their human formYmir was able to return to her human form after sixty years as a mindless Titan and it is implied this happened directly because she devoured Berrick, who was almost certainly a Shifter on a mission to infiltrate the walls. It could be that Titans need to devour a former Titan who has regained their humanity in order to regain their own, similar to how vampires in Daybreakers needed to drink the blood of a cured human to become human themselves. Further backing this up is how Titans seem to attack Shifters as well as ordinary humans. It could be argued that they sense the tasty human within the Titan body, but if you think about it, they actually are more drawn to Shifters than humans. Reiner, Ymir and Eren have several times been swarmed en masse by Titans when humans have been just feet away; Reiner and Ymir's cases being the most obvious. It does beg the question however of where the cycle started. Who was the first Titan to regain their humanity and how did he or she do so without eating a former Titan?
Levi and Mikasa are relatedThe reason why they kicked so much ass is that they're the last Asians on Earth who have inherited the Ninja gene. Therefore, they are THE walking, talking incarnations of Conservation of Ninjutsu to the extreme. They also have a striking resemblance, maybe it's just The Stoic demeanour, and the narrowed eyes characteristic on Asians are more apparent in him.
Alternatively, some Japanese survived through the Titan crisis, and the characters never knew about itJapan has ninjas (better suited for 3D Manoeuvring) and it's on an island (less risk of being crossed by Titans), so why not? Also, the super-sharp blades used for cutting through titan flesh? Clearly based on the katana.
The story doesn't actually place on Earth.It takes on planet similar to Earth that was colonized by humans in the past since Earth was either getting destroyed or overpopulated.
Other Humans may still existWe know that they say most of humanity was eaten, but what about areas separated by oceans and seas? The idea of having other races seems to been forgotten, so most likely any kind of contact between nations separated by sea is gone and they simply forgot those countries existed. It is possible Titans did not appear there or they made walls like the main series.
Mikasa will become a TitanNot a shifter either. She's already tapped into her brain for absolute control. She's been getting head pains that may not have been from wounds(I can't see any). Something will happen that will trigger her transformation into a Titan. As suggested by the Monkey Titan, they too have humans in the napes of their necks. Being enveloped too deep in emotions bonds you with your Titan(think back to Eren's smiling face as he recovered from his first Titan transformation), making you irretrievable and indistinguishable from the flesh in the neck. Mikasa freaking out about Eren will become a Titan this way.
Ancient WMG — Mikasa is somehow part Titan.Concocted after reading the first few chapters, now completely defunct (maybe). It would've explain her bizarre strength (as it didn't seem to be "comedic anime girl strength"), plus her (at the time) unexplained parentage— because no one is ever adopted in fiction unless they have a mysterious plot-relevant past. I held onto the theory even once her backstory was revealed, because honestly, who can break a floorboard just from the pressure of jumping off it? Maybe it was the result of some crazy science experiment, or maybe Titans actually had some way of reproducing, and she was half-Titan or Titan-in-human-form? Of course, now that everyone and their mom is turning into Titans, this may still come true in a round about sort of fashion.
The purpose of the three walls are not unlike that of the settlements in ClaymoreThe Anachronism Stew that is the 3DMG and the blades used by the military hint that mankind either has or had a much higher level of technology than they do now. Combining several other theories, the humans living within the walls are subjects of a biological war machine experiment not unlike that seen in Claymore. There are other humans out there; these poor souls are actually an isolated community used to test and refine the Titans. The Titanshifters are just the latest breakthrough.
Time Travel is involved.I have nothing to back this up, other than the fact that the author said Muv Luv Alternative was an inspiration. What if he didn't just get the grimdark hopeless aspect of it, but also got the idea of a protagonist going through the motions over and over again?
Somewhere out there, there's a Reset Button, and Eren's been the one pushing it.Going with the above theory, Eren wakes up in the first chapter the way he does (crying, wondering about Mikasa's hair length, etc) because he's just coming around into the new start of a Stable Time Loop, but can't hold on to those memories and is stuck going through the same loop. That's what's in the Jaeger house basement: not just the secret of Eren's turning into a Titan, but Grisha's collected knowledge of the loop: the nightmare Eren had about his father acting weird since his mom died and doing creepy science to him happened in a past loop, the same way his opening dream did. Grisha's become aware of his son's ability to carry himself through time, and has been gathering new resources for his son to save humanity every time Eren starts the loop over.
Carla knew more than she let on.Going with the above two theories: when Hannes shows up to rescue Carla, Eren, and Mikasa in the first episode, he first goes to face the approach the Titan, Carla says, "You can't fight it.", not "forget the Titan, save my kids". It could just be that she had no faith in the military (which is why she's so against the idea of Eren enlisting), but she's crushed under a building and can't actually see the Titan until it picks her out of the rubble; she would have had no way to gauge whether Hannes was up to the task. If there really is time travel or a reset button at work, Carla may have been aware of it from a previous iteration.
Titans are essentially an organic alternative to Humongous Mecha, and their concept was based on the Evangelions.Mecha created with organic parts, piloted through a neural interface in the nape of the neck, and can occasionally go berserk against the will of its pilot if not controlled enough. The Titan-shifters are also, like Evangelion pilots, the only hope against the abominations that are invading the city (Titans/Angels). If the "Titans are Lotus Eater Machines" theory is true, that makes their concept as Eva-lites even more apparent because in the end, the Evangelions were the ones who eventually turn the world into a giant Lotus Eater Machine during Instrumentality
The Wall Cult is the real villainAs unlikely as it is, perhaps Reiner, Bertholdt and Annie know something that humans have kept secret from Eren. While the majority of humanity is blissfully unaware, the Wall Cult and the corruption within the Military Police shows that there is more to everything than face value. While King Kong (bad pun, I know) is causing trouble, Reiner, Bertholdt and Annie were trying to save Eren, a fellow titan shifter, before the Wall Cult could figure out a way to execute him or before Mr. Sasquatch could kill him- as it seems that he is unaware of the armored, colossal, and female titans if he was unaware of the military tech of the time while the group had prior knowledge. The Wall Cult has been trying to control humanity, and while the titans are indiscriminately killing, they are perhaps trying to take down the wall cult who have subjugated the colossal wall-titans
The Walls were built in a compromise between humans and Titans, and the Wall Cult is tasked with keeping that knowledge from the public.Continued from the above WMG (I promise I'll stop after this): The complacency of humans is a big thing in this series, along with the livestock metaphor. Humanity had already been mostly wiped out by the time they made it to the Walled City, and the Walls had been prepared in advance. The human leaders who made it happen were basically making a deal with the devil: the Titans would provide humankind with a safe, secure place to live and assured survival of the species, and the humans would provide Titans with sacrifices. That's the Awful Truth that the Wall Cult is hiding; the peace of the Walled City is literally paid for in blood, but when that arrangement was made, it was the best way to ensure that the human race wouldn't go extinct. Historia's family was give the authority to release the truth in the event that someone finally finds a way to wipe Titankind off the face of the earth for good.
The giant trees are artificial.They were genetically engineered to compensate for the massive damage done to the climate by the wars.
The Walls aren't the only structures in the city that are filled with Titans.Chapter 9 shows a Titan, apparently (and awkwardly) gnawing on a support pillar in what is implied to be one of the oldest buildings in the city. This is the same chapter that shows Titan-Eren being eaten by other Titans, apparently being able to sense the tasty human meats inside him; maybe ALL the major architectural structures use Titan foundations. They do come in all shapes and sizes, after all...
The regular Titans are deformed because whoever is changing them is getting sloppy with their work.All the Titans are friggin' horrible anyway, but the further along the story goes, the Titans seem to get more and more deformed; the Sasquatch Titan in particular crushes one that has such a messed up face it looks like something out of Picasso's nightmares, and the one that is most likely Conny's mother can't even move itself because its limbs are too small. It may be because changing humans into Titans is supposed to be a delicate, careful process, but whoever's responsible for performing the "operation" is getting desperate and cutting corners.
The name is not gramatically incorrect in EnglishIt takes place on Saturn's Largest Moon.
Annie told Marco everything before she killed him.I don't have a lot to base this on, except Marco looked peaceful and calm after he died. He may not have been a top-notch hand to hand combatant, but if Annie killed him suddenly or violently he would have been panicking and ended up looking more or less like the other Titan victims. She told him everything, knowing that it'd become a "Now I have to kill you" scenario... but Marco, being thoughtful and unusually good at seeing the best in people, understood, and didn't resist when Annie finally did kill him.
Marco was killed by the Wall Cult, and they gave Annie his gear.Something's been bugging me about Marco's death. Yeah, Annie took his 3DMG and the evidence points to her at least being the last person who saw him alive, but look a little closer at his body when they find it: he's been smashed through a fence, which has tucked (what's left of) his chin against his chest and probably broken his neck, but his hand is still making a fist and he's flat on his back. Now, imagine how he would have looked if a Titan had picked him up and bitten off his upper right side, then tossed him back on the ground: he'd just be flopped down like a rag doll, right? But he's not. It's because he'd been dead for some time and had already gone into rigor mortis when the Titan bit him. He had to have been laying flat on his back with his hands clasped together on his chest for him to land in that position! In other words, whoever killed him couldn't bury him, but still posed his body according to religious rites for the dead, something that the Titan shifters would probably have no idea how to do, much less be inclined to do it at all. Considering that the Shifters all know who Christa is and why she's important, and so does the Wall Cult, there's no reason that they couldn't all be part of the same conspiracy.
There will be more references/shoutouts to Mythological GiantsAssuming there are more Titan Shifters out there, and that they are probably going to be some unique things associated with them, there will be more characters and other stuff that will reference Mythological Giants. We already have Ymir and Utgard which reference Norse Mythology, and the Titans themselves, while some would argue is wrong, reference the pop culture view of the Titans from Classical Mythology.
Somehow, we'll have a Thor and Mjolnir referenceConsidering Norse Mythology is a recurring source, it's likely.
There's a massive Memory Gambit in the works.And its possibly all because of Eren's dad, or at least the serum involved in Titan Shifting. In chapter 46, Reiner also reveals that his memories are pretty faulty. This could mean its only for the people who became Titan shifters through the serum, but throughout the chapters, there have been instances where many characters go into flashbacks wondering why they're remembering those memories in the first place. So far this includes Armin, Mikasa and Sasha. As a well regarded doctor, I don't find it too farfetched that Grisha could've given his patients something that could cause them lapses in memories. And its more than likely he was involved in treating people who suffered from the plagues in Sasha's village.
The Titan that nearly swallowed Armin and actually did swallow Eren was Armin's grandfather.Because now we know they're people, and Armin's grandfather was sent out to reclaim Trost and never returned. We never really get a good look at him, but it makes sense that a balding old man would be attached to his hat, and a smart guy like he probably was could probably get by pretty well out there in the wilderness for a little while. Not a very long time, mind, but maybe long enough to grow a beard out... It's also notable that although he picks up Armin and tries to eat him, he doesn't try to eat him again once he escapes, even though he was right there in front of him, traumatized and rendered a helpless sitting duck.
The Female Titan is Dot Pixis' bane.What he said, that he wouldn't mind being eaten by a truly beautiful titan woman, was a case of Foreshadowing. If/when Annie is broken out of her crystal, she will kill him.
Perhaps the insides of the titan necks where the pilot is hinted to be traps the pilot in a Lotus Eater MachinePerhaps the pilot wakes up in a perfect world where everything they experienced was a dream. It's already hinted that titans are really humans, so why not. Eren seemed to be in one anyways, where Armin had to talk some sense back into him to pick up that boulder and fix Wall Rose.
The settlers weren't the only humans left, and they screwed over the people outside of the wall.So we know that humanity is responsible for nearly wiping itself out, and then that the titans came along at the worst possible time. The few surviving humans, when escaping the titans, came across the walled city and found asylum in there. So here's what I think: the settlers weren't the only surviving humans. There was another group fighting the Beast Titan, who could create titans from people. By studying it, they created titan shifters. This is what allowed them to create enough colossal titans to create a safe haven. The settlers came in later, and were unable to fight as titan shifters, most likely because the method of creating titan shifters is imperfect and resulted in the first titans we saw, which surrounded the city and could eventually become shifters. So the settlers, who were all selfish nobles, screwed over the titan shifters and sealed them out. Ages passed until the beast titan somehow got in, and the outsiders were forced to risk everything by sending special shifters into the city. However, around the same time, the genius Doctor Jaeger happened to come across evidence of the past and perfect the titan shifting formula, giving it to Eren. This is why Reiner's group is willing to abandon their efforts to wipe out humanity and/or capture the Beast Titan for Eren: they know that there's a chance that he's got the secret to the perfect titan shifting formula in him, and can finally end the war.
Krista/Historia's family is deeply involved with the Wall CultDuring the battle between the female-type and Eren within Wall Sina, there's a couple of panels that focus on one member of the Wall Cult and this member looks very much like an older Krista/Historia.
Once they find the Jeager household, several members of the cast will become new Titan Shifters.Whether it be some accidental explosion/spill (I should think that if you smash a house with a lab under it, things may have been broken inside, or scavenging around may trigger an explosion/spill), or they voluntarily decide to use it to gain an advantage (admit it - new titans may be awesome), the possibility of more Titan Shifters, be they from the cast, or someone recovered from the Titans, does exist.
Abnormal-class Titans are early bloomers, figuratively speaking.We know the Titans are humans, trapped in a dreamlike/nightmare state, but that after a very long time, are capable of coming back to themselves in the form of Titan Shifters. But all the ones we've seen so far are classified as abnormal types rather than by their height: Reiner has armor plating, Bertholdt is huge, Annie's a babe, Ymir's a Dance Battler, Eren is some kind of violence elf. And there are a few abnormals running around in the show (that flying-leap one that eats Thomas, for instance) that have unusual capabilities; it could be that all the Titans will eventually come back to themselves, it's just a matter of time, but the abnormal ones just reach that stage earlier than typical. Ymir's the closest of the known shifters to a normal Titan, and we see from the flashback that Reiner and Bertholdt had already regained their human forms as of sixty years ago when Ymir regained hers. It could be that the 100 years that Titans have been running around simply haven't had enough time, but they inevitably will. Which might mean that...
Erwin is a bad guy
Humans really did build the Walls.The closing credits have a bunch of images painted on the wall that divides the cast, including ships sailing across the ocean to reach the Walls, opposing groups on horseback apparently marching on each other, and a paper-doll-chain of huge figures that could easily represent the Colossal Titans that make up the core of the Walls. Among those images is a bunch of men on horseback, dragging a pallet with what looks like a Titan strapped to it by its wrists and neck...
The lighting from titan shifting are transmutation sparks.They transmute the surrounding material to create their bodies. The injection Eren received gives the ability to perform this specialized alchemy.
Titans eat people because that's how they change back into humans.Going with the theory about the Walls being not a refuge but a breeding pen: Ymir says she "stole the Titan's power" from a childhood friend of Reiner and Bertholdt. If that kid was a normal human and not a Shifter (and since he didn't Shift to save himself, that may have been the case) it could be that something about the act of eating a human has a chance of triggering the change. They really do eat to survive, just not in a way that makes sense to humans.
"Offering up your heart for humanity" is more literal than it sounds.We see a lot of people get bitten in half, and corpses with missing limbs and missing limbs without corpses... but never any organs. It could just be because that's a little too much gore for a mainstream manga, but what if they don't eat humans as much as they eat human hearts, and eating the right one, or enough of them, is somehow what turns them back? It would also lend a bit more meaning to the scene where Mikasa knows Eren because she can hear his heart beating...
The Titans are koloss.Albeit ones with the ability to burn Feruchemical gold. Their spikes are clustered at the back of the neck. (Also they're made from the Hemalurgic essences of a lot more than...what was it, five humans? Either that or they're really, really old, at least for the big ones.) They eat humans because...I dunno. They're just like that. Oh, wait, no. There's a super-powerful Soother out there somewhere, probably affiliated with Mr. Sasquatch, controlling them all, which is why they never kill each other. And Titan Shifters have something to do with Feruchemy. The six-meter in the side story talking about Ymir, and some of the theories surrounding it, really reminded me of Human and his interactions with Vin.
Humanity's leaders betrayed the Titan Shifters.Building somewhat on one of the other WMGs around here somewhere, with humanity warring against the Sasquatches before the walls were built, the Shifters were probably created as weapons. But when the war ended in a tenuous peace treaty, the humans agreed to destroy most of them, probably with one of the leading Shifters talking a lot about self-sacrifice but secretly keeping himself alive and living in luxury, or something similar for the king or whoever. This left some of the other survivors rather jaded about the concept of self-sacrifice and doing things for others. Also I'm pretty sure the wall titans are actually ape-types, just big ones. They resemble Sasquatch a lot more than any of the others if you look closely. Then again, they might just be a type we haven't seen before.
The series will have a Book Ends endingIt'll end with Eren sending his consciousness back in time to the day the Colossal Titan arrived.
Four Factions theoryThis is a theory based on some of what we've seen so far, detailing the possible entities in the world. Humans, or "Soldiers" This faction consists of the Walls, including the royalty. Having originally lost a war with the Titans, despite developing Titan Shifters, they formed a peace treaty with the Titans, betraying their Shifter weapons, to be imprisoned within the walls in return for peace. Their goal is to maintain the status quo, either permanently or until the Titans can be defeated. Titans, or "Them" These are, of course, the Titans, led by high-ranking officers such as the Ape Titan, and presumably others of his kind. The actual leaders of this faction are currently unknown. During the original war, the Beasts, possibly an invading alien race, being a species with the unique physiology of a small vital pilot in a much larger but regenerating body, created an army of similar creatures with humans as the basis in order to ensure victory. They agreed to the peace treaty, allowing some humans to remain alive in a limited capacity to use for their unknown goals, whether that be breeding them as food or experiments of some sort in order to perhaps restore their dying race. Shifters, or "Warriors" The Shifters are the descendants (or perhaps still the originals) of the weaponized Titan Shifters developed and deployed during the war to counter either the Beasts or their Titan minions. (If the former, the Titans may in fact have been created from a corruption of Shifter technology, which would itself be based on Ape physiology.) When the peace treaty was written, they were exiled or killed, but at least some of them survived. They have a tendency to be extremely jaded and cynical. In 845, they attacked the Walls in order to force humanity to fight once again, but abandoned this plan in 850 with the discovery of Eren Jaeger, who they hope will allow them to create a new army of Shifters to help defeat the Titan faction. It's likely that the methods used to create the Shifters to begin with were destroyed after the treaty was signed, but kept/rediscovered by Grisha Jaeger and used to change Eren. Liberated Titans, or "Ymir's People" These people are Titans who have, by unknown means, regained human intelligence, becoming beings similar to Titan Shifters, but with more typical Titan forms. Trainee Corps member Ymir belongs to this group, and could be its founder, and the one with knowledge of the methods used to restore Titans to human status. They appear to be currently in hiding, with no particular ambitions other than survival. It's possible that their ranks consist solely of former Aberrants, with rank-and-file Titans being irretrievable, as Ymir's Titan form strongly resembles an Aberrant rather than a normal Titan.
Marco is the real head villainNot particularly likely, but there are several things that are a little... strange. Though, if anything, he would be an extremely Affably Evil villain.
A Coordinate Built the wallsOnce, long long ago, a coordinate was somehow found/born/reawakened by the humans, and this Coordinate also joined the human side. Eren can command Titans, right? So what if this Coordinate somehow commanded thousands of Colossal Titans to form the walls? Now isn't it obvious why Bertholt thought that power was too strong for Eren to handle?
Jean and Marco are both titan shifters not associated with Reiner, Bertholdt, and AnnieBecause it would be hilarious if it turns out that all of the very top students sans Mikasa were titans. Also, of all the remaining human trainee soldiers, Jean and Marco are the only ones whose pasts have not been revealed or hinted at. This was why Jean was so surprised that Marco had died since he could have shifted into a titan and saved himself. Or alternatively, he revealed his titan self to Annie and she killed him, cutting off the side of him that had titan markings to hide his secret.
Titans have always been aroundAssuming the show does, in fact, take place on Earth, then they share our history. That means that there were many cultures with giants in their mythology and folklore. Maybe the Titans had always been around, but sleeping, until humanity did something stupid and woke them all up. Maybe mixing a little science with magic to try and make war machines.
Titans can't see color.Not even gradations of color; their vision isn't analogous to human sight at all.
There is a Necromancer Titan.So we have the Beast titan who is all but stated at being able to turn living humans into Titans. So the logical extreme is one that repurposes the restless dead into new titans. Possibly grafting the dead souls into new bodies using its own flesh so it always appears as a starved, near skeletal like corpse. Alive or dead the Titans will screw you over.
As of Chapter 51, any Plot Armor previously owned by the characters are now gone.Attack on Titan has never been merciful to its characters, but now, with Jean, Mikasa, Armin, Sasha, Historia and Connie directly in charge of Eren's safety, any hint of immunity to death they once had is now gone. As of Chapter 51, all of their backstories and motives have been revealed, making them all ripe for the killing. God speed.
Hard Steel is Titan SkinThe blades used with the 3DMG are noted as being incredibly light, and the only things capable of tearing Titan flesh without breaking. What else is described as being surprisingly light, and noted as being able to kill Titans? Other titans. Titans have been shown to be capable of producing particularly hard skin, as evidenced by the Female Titan and the Wall Titans, and Hange gets a piece of the stuff which fails to disintegrate like normal Titan flesh, so it seems logical that people would use the stuff as a material for the swords. Also, the manufacturing process for creating hardened steel is said to be a trade secret, and the people running it probably wouldn't want the public to know that it's Titan skin.
The 3DMG runs on Titan blood vapor.Expanding on the theory above, it seems a bit odd that gas compression would be possible in the setting, given that the level of technology is clearly close to that of the Renaissance, and gas compression wasn't widely implemented until the twentieth century or so. However, Titan blood has been shown to evaporate very, very quickly, and the vapor from it looks suspiciously similar to the gas that comes out of the 3DMG. Furthermore, the 3DMG gas also dispels very quickly upon being expelled. And Titan blood, wouldn't be hard to bottle up and distribute, given that it would do the compression by itself upon evaporation. The soldiers wouldn't suspect a thing, given that opening a canister of "compressed gas" would be sensibly dangerous to them and that Titan matter is very light. Combine this and the hardened steel with the conspiracy theory that the government is actively trying to maintain a breeding pen with the Walls, and suddenly things start making sense.
The reason Titans are single purposedIs because they are controlled by human brains. Most large animals have larger brains to maintain precision over movement and sensation. The human brain doesn't contain enough nerves to control and take in all perception from the titan body. To get around this, only parts of the titan's body are connect to the nervous system and the brain loses its general intelligence. This also explains why some titans feel pain but others don't.
Levi is secretly a womanBecause that would be the ultimate troll move towards fans and Isayama is fully capable of it.
The titans self-destruct upon deathWhen the titans are killed, they seem to evaporate. Parts of their bodies that are removed do the same, even the smallest drops of blood. It also destroys the bodies of the people they have eaten. It seems likely that rather than burning up from the heat that they self-destruct producing a large amount of heat. The colossal titan can control this to destroy his body very quickly.
The next titans we see will be able to counter 3DMGSince the Beast Titan took the 3DMG, it will probably alter new titans to be able to nullify the at least standard tactics.
The faction within the walls.They're talked about a lot in chapter 52. All we know is that they are frantically trying to track down Eren and Christa and murdered Pastor Nick after he wouldn't give in to their torture, and that they're connected to the military police and royal family. So, who are they? What do they really want?
Historia is a Child by Rape.Historia noted that her existence was painful to her family, and that her mother would go out every night to meet someone, earning income from an unknown source. She treated her daughter as something horrible, that she could not stand to associate with. The way Lord Reiss tossed her aside suggests he never cared about her to begin with, as he shows more compassion towards the daughter he's literally just met. As such, it's possible the relationship between Historia's parents was not consensual, but rather a nobleman forcing an attractive servant into sleeping with him.
Historia's mother was a prostitute.She's a beautiful farm girl who dresses up in fancy clothes and gets a ride to the city in a carriage to go and make money, with an illegitimate daughter but no apparent lover in her life. Given the nature of the setting, I don't think she was going there to sell insurance.
Pastor Nick did break under torture.In chapter 52 Pastor Nick has been removed from the Survey Corps' care and seems to have withstood torture by nail-removal (i.e. all his nails were removed whereas the removal of just one would be sufficient for a normal person to crack) and Levi praises him on his strong will. That is just conjecture on Levi's part however, as his torturers could have just as easily been sadists who continued even after they got the information they wanted, or they did it after they killed him to cover their tracks.
There is a fourth wall keeping the Titans inThe country that everything takes place in is actually a massive prison for the Titans, with humans stuck in the middle to serve as bait to keep them from breaking out. But after a hundred years of nothing to eat, they started attacking the fourth wall. Annie, Reiner and Bertolt came from the lands outside to break the inner walls to cause the Titans to press inwards, away from the outer walls. This would mean that much of the rest of the world is intact and safe, and would explain why Annie, Bertolt and Reiner continue to act on their mission despite being so traumatized by it, they're just trying to protect THEIR homes by sacrificing others! The Wall Cult could serve as Wardens in this sense, fully aware of the truth of their country, but complicit for the sake of the rest of the world, using religious dogma to motivate people to protect the walls when the real wall they care about is the one no one knows exists.
There's a limit as to how much Titan-shifters can shiftJust as it says. Maybe once they've exceeded their limit, their bodies become too engrossed to their Titan forms that they just practically disappear. Which explains as to why the army couldn't find any human inside the nape of Regular Titans. The limit also varies from each individual. Also supports the theory that all regular Titans were once humans.
Annie will teach Eren how to use the hardening ability and possibly moreWhen Annie is released from the crystal she will ofter the chance to live by teaching Eren what she knows about the titan's powers including the hardening ability that she has made full use of.
The Reiss family and the Wall Cult are responsible for sacrificing humans to try and appease the Titans.The book Historia was reading in chapter 54 shows an image of a girl, holding an object which looks like an apple (but could also be a heart) to a titan with some resemblance to Ymir. The Reiss family and the Wall Cult are intrinsically connected, and the Wall Cult is somehow responsible for placing giant titans inside the walls. It's possible that other methods may have been use to protect humanity, including sacrificing specially picked young women. Which leads on to another theory…
The girl shown in the book in Chapter 54 is Ymir.Hair colour aside, Ymir mentions in an earlier chapter that she died for the happiness of a great many people, which suggests some kind of sacrifice. The book seems to show a young girl being sacrificed to a titan who looks similar to Ymir's titan form. If the theory of titans somehow regaining humanity by eating people is true, Ymir may have become one with the titan who ate her and returned.
Nazis are involved? Some other form of eugenics?There are hints that SNK happens in a world related to ours. What if it occurs in some alternative universe, and it occurs after world war 2 (and not 3). It was mentioned explicitly that the concept of race is unknown to many people (see the talk between young Mikasa's kidnappers). Furthermore, ote the frequence occurence of german names. The SNK walled city is some kind of an eugenic experiment designed to create a single race of human beings. A single race of human beings may also be the "solution to human wars" which was mentioned previously.
The Woman is Historia's sisterBased on her apparent resemblance to Historia and her father, the woman is the legitimate daughter of Reiss and a member of the wall cult. Her memory powers are a means for the conspiracy to control the population. Grisha also has ties to the wall cult and conspiracy, and transferred her memories to Eren. She was teaching her half sister how to read out of kindness and erasing her memories to prevent her from becoming involved in the cult. She was so horrified by Historia's desire to be like her because she knows how bad the cultists truly are, and worked with Grisha to undermine them.
The Woman was the one from Eren's dream at the start of the mangaShe's the one who gave him the scarf, which he then passed on to Mikasa, which is why he mistook the woman in the dream for her. This is important because it means that Grisha had already been screwing with his memories before the Colossal Titan attacked.
The Titans aren't just keeping the humans in.They're keeping the Shifters out.
The history of Humanity is a lie.Erwin states in ch. 55 that his father believed the government altered the memories of the people 107 years ago, around the exact time Titans supposedly appeared. This was done to control them (using the Coordinate), and we learn from Djel Sanes that the Secret Police actively eliminate intellectuals, explorers, inventors, and anyone who gets too curious or rocks the boat in any way. We see that one inventor killed was building a revolver, fitting with prior hints at the government preventing technological advances. The soldiers are trained in various skills, but it is noted early on that things like self-defense are not prioritized and most simply go through the motions. The government does not want a population with the tools or skills necessary to fight other humans, and the Survey Corps is their tool to help maintain the status quo in two ways: it eliminates the freethinking and curious via Titans, while also providing a constant reminder to the citizens that the outside world is bad. The Walls and the Titans exist to keep humanity in, to prevent the people of the Walled cities from attempting to leave. Eren's comparison of people to livestock is accurate, in that humanity is being kept in confinement and encouraged to not think for themselves or dream of leaving. Annie and Reiner both actively encourage not only honing fighting skills, but freethinking that questions the status quo because they are aware of the government's efforts to keep the population domesticated.
There will be a pseudo industrial revolution following the conclusion of the revolution arc.The reason there have been no major innovations for so long is because any and all intellectual thinkers and inventors who weren't completely dedicated to the royal family were assassinated. Who's to say they didn't keep some of their research and the like for themselves though? And who's to say that this stuff won't get out once the Central MP is out of the picture? Or that people who realized what was going on and chose to hide their work as a result won't come out of hiding?
Marlowe will prove to be a Chekhov's Gunman.Many seemingly minor characters have since reappeared and played unexpected roles in the story. Marlowe is one of the few soldiers from the Military Police to get any development, and he explicitly wants to change the system for the sake of the people. He will reappear during the revolution arc, possibly aiding in the efforts to overthrow the corrupt government. Hitch, the other MP given development, may also play a role in the upcoming revolution.