History Manga / KnightsOfSidonia

* CreatorProvincialism: Many countries built their own ships but the Japanese ship, Sidonia, is the only one we see as the rest have either been eaten by Gaunas or gone off in different directions and are too far away to communicate with.
** WriteWhatYouKnow: Nihei explained in an interview why Sidonia is a Japanese ship.

** There is a significant proportion of ''Sidonia'''s population that comes to believe that [[spoiler:the Gauna are specifically targeting the ship because of the Kabizashi spears. They are dismissed as insane, up until they realize the Hoshijiro clone is [[OhCrap always looking in the direction of the Kabizashi...]]]]
** Later subverted. [[spoiler:Even though the Gauna do seem to be drawn to the Kabizashi, that didn't stop them from attacking a ship of demilitarized colonists.]]
*** Another scene from Season 2 indicates that Gauna ''also'' are attracted to high-density Higgs Particles. This same resource is used as fuel for propulsion, as weapon for energy attacks, and as all-around space-worthy power source by Sidonia technology.

** The Honoka "sisters" defy ReiAyanamiExpy with vengeance. Each of them has their own name (Honoka En, Honoka Hou, etc) and is notoriously protective of her individuality. One thing they do have in common is that neither of them is [[ExtremeDoormat timid and complacent]] nor an InnocentFanserviceGirl, as Nagate painfully learns firsthand when accidentally walking on them changing clothes.

** The Honoka "sisters" defy CloningBlues and ReiAyanamiExpy with vengeance. Each of them has their own name (Honoka En, Honoka Hou, etc) and is notoriously protective of her individuality. One thing they do have in common is that neither of them is [[ExtremeDoormat timid and complacent]] nor an InnocentFanserviceGirl, as Nagate painfully learns firsthand when accidentally walking on them changing clothes.

''Knights of Sidonia'' is a manga from Creator/TsutomuNihei, creator of ''Manga/{{Blame}}'' and ''{{Manga/Biomega}}''.

''Knights of Sidonia'' ended in September 2015, after 78 chapters.

* {{Gainaxing}}: Kind of subverted; the anime features fairly realistic breast physics, in particular for scenes in null gravity.

** The Earth was cut neatly in half, and humanity's desperate flight to the stars is almost Class 3. ''Sidonia'' may be the last refuge of Humanity, because contact with the other ships has been gone for almost 800 years.
** ''Sidonia'' itself lost more than 90% of its population in the relatively recent past. The vast majority of the ship's current population are descended from artificial genetic templates or are clones of the survivors, [[spoiler:including the protagonist]].

* YouGottaHaveBlueHair: Teruru Ichigaya's hair is literally blue. Justified because she is an artificial life-form.

* MohsScaleOfScienceFictionHardness: A solid 4, at least for the humans' daily hardware.

An [[http://www.animenewsnetwork.com/news/2013-05-16/tsutomu-nihei-knights-of-sidonia-manga-gets-anime anime adaptation]] premiered on April 10, 2014. It is being produced by Creator/PolygonPictures, the [=3DCG=] studio behind ''WesternAnimation/TransformersPrime'' and ''WesternAnimation/StarWarsTheCloneWars'', as its 30th anniversary work. Notably, it was licensed and dubbed by Creator/{{Netflix}} as one of their "original" shows. It was later announced that Creator/SentaiFilmworks got the license to release the series on home video.

Netflix's streaming licence to both seasons of the anime [[https://www.fandompost.com/2020/12/07/netflix-sidelines-knights-of-sidonia-anime-with-expiration-date/ would expire in January 2021]], with Creator/{{Funimation}} [[https://www.funimation.com/blog/2021/07/29/funimation-brings-knights-of-sidonia-film-to-theaters-in-september-series-to-streaming-next-month/rescuing it]] to stream on their site from August 3, 2021, while also licencing ''Love Woven in the Stars'' for theatrical release in the U.S. & Canada from September 13, 2021.

Netflix's streaming licence to both seasons of the anime would expire in 2019, with Creator/{{Funimation}} [[https://www.funimation.com/blog/2021/07/29/funimation-brings-knights-of-sidonia-film-to-theaters-in-september-series-to-streaming-next-month/rescuing it]] to stream on their site from August 3, 2021, while also licencing ''Love Woven in the Stars'' for theatrical release in the U.S. & Canada from September 13, 2021.

* CelShading: The characters are actually done in 3D whenever they're not part of the background, but they maintain proportions and conventions of 2D animation. They're literally distorted depending on the viewing angle and often heavily postprocessed; sometimes the omnipresent scratches and other texture details are the only giveaway, but in other shots CG can be noticeable with details like mouths and hair.

* {{Hermaphrodite}}: Due to some events in the setting's backstory, a third gender was created. Like some species of fish and amphibians, they eventually metamorphose into one sex or the other in order to breed.

[[caption-width-right:350:[[Film/TheBluesBrothers It's 106 Astronomical Units to the Lem System. We've got a full tank of Higgs Bosons, half a magazine of Artificial Kabi, it's dark and we're wearing]] [[BreadEggsMilkSquick catheters]]. Hit it.]]

[[caption-width-right:350:That white is gonna ''stain.'']]

* ManInWhite: Most of the Garde pilots have white flight suits. [[WhiteShirtOfDeath Considering their survival rate]], they might as well [[RedShirtArmy wear red]].

* CelShading: The characters are actually done in 3D whenever they're not part of the background, but they maintain proportions and conventions of 2D animation. They're literally distorted depending on the viewing angle and often heavily postprocessed; sometimes the omnipresent scratches and other texture details are the only giveaway, but in other shots ConspicuousCG can be noticeable with details like mouths and hair.

* HolyShitQuotient: Fairly low in the first season of the anime. In Season 2, however, the HSQ skyrockets, to the point where it gets hard to tell if it's actually still the same show.

* AbortedArc: Doubles as WhatCouldHaveBeen, and AbortedArc. [[spoiler:A Honoka sister, Shou, is assimilated by the Gauna in the middle of a battle. The plot actually shifts to her perspective, and she’s fully cognizant; possibly making her the first successful human chimera produced by the Gauna, and throwing the door wide open on new possibilities regarding human/Gauna communication. While she initially retains her human form, she starts to mutate upon realizing what happened and is promptly head-shotted by a rail gun and dissipates. This never happens again for the remainder of the plot, and its never explored any further.]]

* AnyoneCanDie: Before the GenreShift below. The author introduced a group of "aces" who got killed on their very first sortie.

** The practical reasons behind Sidonia’s hardships are mostly speculative. However, unless the other seed ships ditched everything that attracted the Gauna to Earth in the first place, its very likely the surviving ships had to take similar measures as Sidonia to just keep their populations going. If that’s the case, then ‘conventional humans’ are probably already extinct by the start of the series.

* AbortedArc: Doubles as WhatCouldHaveBeen, and AbortedArc. [[spoiler:A Hinoka sister, Shou, is assimilated by the Gauna in the middle of a battle. The plot actually shifts to her perspective, and she’s fully cognizant; possibly making her the first successful human chimera produced by the Gauna, and throwing the door wide open on new possibilities regarding human / Gauna communication. While she initially retains her human form, she starts to mutate upon realizing what happened and is promptly head-shotted by a rail gun and dissipates. This never happens again for the remainder of the plot, and its never explored any further.]]

''Knights of Sidonia'' is the latest manga from Creator/TsutomuNihei, creator of ''Manga/{{Blame}}'' and ''{{Manga/Biomega}}''.

* AbortedArc: Doubles as WhatCouldHaveBeen, and AbortedArc. [[spoiler: A Hinoka sister, Shou is assimilated by the Gauna in the middle of a battle. The plot actually shifts to her perspective, and she’s fully cognizant; possibly making her the first successful human chimera produced by the Gauna, and throwing the door wide open on new possibilities regarding human / Gauna communication. Before we can find out any more, she’s promptly head-shotted by a rail gun and dissipates. This never happens again for the remainder of the plot, and its never explored any further.]]

* AbortedArc: Doubles as WhatCouldHaveBeen, and AbortedArc. [[Spoiler: A Hinoka sister, Shou is assimilated by the Gauna in the middle of a battle. The plot actually shifts to her perspective, and she’s fully cognizant; possibly making her the first successful human chimera produced by the Gauna, and throwing the door wide open on new possibilities regarding human / Gauna communication. Before we can find out any more, she’s promptly head-shotted by a rail gun and dissipates. This never happens again for the remainder of the plot, and its never explored any further.]]