History Fridge / HaruhiSuzumiya

** Then again, considering that knowledge of the future is [[{{Catchphrase}} classified information]], according to the resident time-traveller, Yuki may similarly avoid divulging knowledge of the future.

** The ''other'' Humanoid Interface that also exists during Endless Eight, Emiri Kimidori. As she is created by the Data Overmind just like Yuki is, it's highly probable that she also endured Endless Eight with full memory and knows what caused it. Did it leave any impact on her as it did to Yuki? Does her AllpowerfulBystander display conceal anything else?

** In an extra sense in the light novels: when she decides the SOS club needs to recruit she somehow managed to get a cute, smart, athletic, incredibly cheerful and eager to please girl who's desperate to get in because the SOS is the embodiment of everything she's spent her life wishing for. It eventually becomes clear that while this girl exists partly to fulfill Haruhi's desire to have present a MarySue character echoing her personal philosophy, in a sense ''Haruhi'' exists in the same book to demonstrate just how much happier and better socialized she would have been had she just been firmly convinced of being the protagonist in a story written by an all-powerful author, with the purpose of the universe being to cheer and entertain her, rather than spending her life dedicated to seizing happiness and meaning by force. The new girl doesn't need God Mode only because Haruhi's covering it for her.

* The movie version of ''Disappearance'' gives a subtle hint that Kyon was never alone in the hospital before it's revealed [[spoiler:Haruhi was there the entire time]]. If you look closely, next to his bed there are [[spoiler:a pair of girl's shoes. Her coat is also clearly seen hanging in the foreground on several shots. The weird thing is that her shoes are on the opposite side of the bed than the one she's sleeping on. What was she doing when no one else was around?]]
* During ''Disappearance'', [[spoiler:Yuki remakes the world to a more ordinary one.]] One possible reason she went to these lengths is because of what she experienced during Endless Eight ([[spoiler:spending hundreds of years trapped in a time loop Haruhi caused]]). So how could the anime possibly replicate something like that? OH! [[spoiler:Make the anime version [[ArcFatigue feel like it's going on forever]] ''exactly like it is for Yuki''!]]

* Why Yuki [[spoiler:was elected to be the ambassador to the Sky Canopy Domain]]:
** [[spoiler:Kyon stopped the IDSE from killing Yuki. There was a loophole though, which the super intelligent IDSE saw]].
** Alternatively: [[spoiler:Nagato has spent close to ''six hundred subjective years'' observing humans with most of that time in a state of AndIMustScream. She has dealt with insanity that the IDSE could not even fathom, wouldn't that, then make her the most ideal candidate for [[DidWeJustHaveTeaWithCthulhu dealing with the Sky Canopy Domain?]] Rather than thinking of the IDSE as a child angry that something was taken out of its control it would be more likely to think of it as a computer using the most suitable resource available]].

* Yuki and Ryoko's actions in Disappearance didn't make as much sense as they should have. Yuki was bored and upset and angry and tore apart reality out of vengeance. But why did she give Kyon the keys back to his reality? And why did Ryoko still stab Kyon? But if you look at them as complex programs, rather than humans, it makes sense. Yuki is hard-coded to be a servant and an observer--but she is able to change who she serves and observes. It's also probably possible that they can re-hard-code themselves (or that the radical faction gave their interfaces this ability)--Ryoko [[spoiler:remembers the alternate timeline]]. Given her determination to kill Kyon during the first murder attempt combined with her seeming lack of emotion, it's perfectly possible that she re-wrote herself to kill Kyon at all costs (though the reason why might be irrelevant to her coding). Therefore, given her own existence and Kyon's presence, she's gonna go for it. This also explains why she didn't try to murder him at school 'later that day'--she had already done so, so [[InsaneTrollLogic there was no longer a need to kill him again]].

* So on the Tanabata that started everything, Haruhi drew a large patch of symbols on the school blacktop because she was [[IJustWantToBeSpecial really,]] [[IJustWantToHaveFriends really,]] [[DesperatelyLookingForAPurposeInLife bored.]] These symbols, along with the awakening of Haruhi's powers (both happening at around the same time), drew the attention of various aliens, time travelers, espers and about a million other things that we don't know about. Haruhi drew those symbols with the goal of alerting all the strange and interesting things in the universe that "I am here", much like how a person stranded on a deserted island would try to get the attention of passing ships and planes. So in other words, on that fateful Tanabata where the entire plot of the series was planted, Haruhi was sending out into space a distress signal. [[spoiler: In other words, an SOS.]]
* This one is probably more like Obvious Brilliance to the Japanese viewers, but it kinda gets LostInTranslation: in Disappearance, it's very windy the night when [[spoiler:Yuki rearranges the world]], which turns out to be the source of that wind. The next day, half of Kyon's class is sick [[spoiler: [[TimeTravelTenseTrouble (and they have been for days, but they were fine yesterday)]]]]. Guess what the Japanese words for "cold" (the disease) and "wind" are. [[spoiler:They're both "kaze."]]
* Itsuki first notes in ''Sigh'' that big trouble is brewing if he stopped blithely smiling at everything. When does he first demonstrate this? [[spoiler: If you watch the anime or read the manga, earlier in ''Sigh'' - he is beyond not smiling and legitimately worried when he catches Kyon's arm to prevent Kyon from punching Haruhi. It's more than hinted that he thought Kyon's actions would have caused TheEndOfTheWorldAsWeKnowIt.]]
* The line Kyon shouted to Haruhi [[spoiler: three years ago: "Sekai wo oonimoriagerutame no John Smith wo yoroshiku".]] What Haruhi's SOS-dan stand for: "Sekai wo ooini moriagerutame no Suzumiya Haruhi no dan".

* [[spoiler:Imagine being Yuki. Imagine being created with the one sole goal to keep things in order. Now imagine having to put up with all of Haruhi's crazy scheming, having to somehow restore everything to the way that it should be, every day, no end. Now imagine not being able to scream, or cry, or let out any of your frustration, because you weren't created to have emotions, and you're isolated, and you have no choice except to go along with what you were told, because you can't do anything to change it, even if it's nearly 600 years of the same summer. No wonder Nagato wanted to change the world in ''Disappearance''.]]
** The ''other'' Humanoid Interface that also exists during Endless Eight, [[spoiler:Emiri Kimidori]]. As she is created by the Data Overmind just like Yuki is, it's highly probable that she also endured Endless Eight with full memory and knows what caused it. Did it leave any impact on her as it did to Yuki? Does her AllpowerfulBystander display conceal anything else?

* The SOS brigade symbol is a recreation of the drawing the Haruhi made 3 years ago. The symbol that brought the attention of a Data Lifeform was stated to be "an explosion of unmeasured amounts of data from a parallel world", according to Nagito. It's a ''literal'' SOS this time, like the drawing that Haruhi made!

* The SOS brigade symbol is a recreation of the drawing the Haruhi made 3 years ago. The symbol that brought the attention of a Data Lifeform was stated to be "an explosion of unmeasured amount of data from a parallel world", according to Nagito. It's a ''literal'' SOS this time, like the drawing that Haruhi made!

* In the English version, Stephanie She's portrayal of Mikuru can seem like going overboard with the cute, shy girl thing. But if you watch the Japanese version, you'll realize Mikuru's voice is supposed to be annoyingly cute as part of her being a parody of {{Moe}} characters in anime. A lot of characters are intentionally annoying; skilled authors will hide this fact well. The hope is that you'll associate them with someone you don't like and thus make the world of the show more alive for you. I don't think anyone will argue there's a shortage of those people. Upon realization of this fact, [[TheScrappy scrappy characters]] gain a little respect. They're there for a reason, and taking them away will destroy a large part of the show. [[CreatorsPet It's still on the creator not to overdo it, however.]]

* Haruhi changed her hairstyle everyday to ward off aliens. It was only when she kept her hair to one style was when she met them. A mini LogicBomb might've just gone off.

* Haruhi changed her hairstyle everyday to ward off aliens. It was only when she kept her hair to one style when she met them. A mini LogicBomb might've gone off.