History Manga / SpiritCircle

* TheLastOfTheseIsNotLikeTheOthers: Kouko insists that she and Fuuta are destined to fight and hate each other, but Fuuta points out that Houtarou and Iwana managed to make amends and [[BigSleep died peacefully]].

** [[spoiler:According to theory, the Sleeping Tower's Non-Living. Being in a state between life and death due to their brains getting kept alive by the tower, the Non-Living's souls don't get sent back into the natural order and therefore don't add on to the world's birth or death rate. Lafalle's council of Sleeping Tower leaders decide to terminate the program in order to rectify this. Fortuna (and to an extent, Lapis) surmise that since souls can travel wherever they want, they're probably just avoiding the 33rd century altogether instead of being barred.]]

* RedBaron: After Fortuna creates a second spirit Circle, he gains the epithet [[spoiler: "King of the Dead]]"]].

* RedBaron: After Fortuna creates a second spirit Circle, he gains the epithet [[spoiler: "[[{{Necromancer}} King of the Dead]]"]].

* GovernmentConspiracy: [[spoiler:Secretly, part of the government agrees with Arion's mindset of bringing humanity back to a less technologically proficient age, so they've halted any technological progress in fear of it adding to the problem. Some factions even endorse the terrorists themselves, alongside killing anybody who they think knows too much about the situation or those who have begun forbiddenresearch. The Sleeping Tower managers are not exempt from this-- one of them ''started'' Arion, and the managers have a history of being killed for forbidden research.]]

* ForWantOfANail: Carol's observation of time travel notes that the same lightning strike will always behave differently while observed. [[spoiler:This is important for the climax: Fortuna returning to the world [[GrandTheftMe in Fuuta's body]] caused Rei and Kajirou to be reborn as Fuuta's siblings even though Fortuna had previously predicted only one child would exist and be stillborn.]]

* AFormYouAreComfortableWith: [[GenderFlip Fuuko and Kousuke]] meet [[TheGreys a Grey]] and some kind of tentacle alien. They're quite friendly, put a bullet in that [[ChekhovsGun special gun]] as part of a MemoryGambit, and mention that they took those forms based on what the primitive Earthlings expect aliens should look like. [[spoiler:The next chapter casually implies the pair are future incarnations of Fuuta and Kouko, but it is more likely that they are Carol and her boyfriend, considering that a fixed robocat was seen in the world and that the kitchen looks like the one in the basement where Carol slept. Lafalle told her the code to the basement and suggested that she would take Elias with her, so it is quite plausible.]].

* DisneyVillainDeath: [[spoiler: After being cut by the Spirit Circle, Fortuna falls pitches over the edge of his vehicle.]]

* BreadAndCircuses: The reason why the rituals keep happening. The elders are aware that the sacrifices won't actually help their crops and resources grow, but they do it anyway in order to boost their people's morale and keep them hopeful through the interim.

** We don't actually see this happen, but [[spoiler:Spacifica takes away both spirit circles in exchange for Rune and East eventually being reborn as Fuuta and Kouko's children. Kouko however points out that this could just as well happen in alternate universe due to how reincarnation works.]]

* FourElementEnsemble: Near the end, Fuuta saw a dream about four gods [[spoiler: (who may or may not be his, Kouko's, East's, and Rune's future incarnations)]], each embodying one of the classical elements.

* GenderBentAlternateUniverse: Fuuta's seventh reincarnation took place in a universe in a similar timeframe where every character was changed into the opposite gender. Here, "Fuuko Okeya" was a girl who loved studying geology and had crushes on both "Non" and Koko's counterpart "Kousuke".

* CosmicPlaything: Flambe's incarnations don't have it good in any of his lives. He grows into an insane and jealous noble in both Sengoku era Japan and the Middle ages, works on his temper in the 33rd century but [[spoiler:fails to stop a world ending black hole bomb]], and in Fortuna's time gets mistaken for [[spoiler:the now criminal]] Fortuna, watches his fellow former apprentice nearly destroy the world, and then hangs himself after making artificial spirits because he felt like he failed the teachings of his master.

* HolierThanThou: Kouko tends to act this way at the story’s start. Since she is generally better informed about their past lives than [[BewilderingPunishment Fuuta]] is- especially regarding [[MadScientist Fortuna’s]] crimes- she tends to frame the tragedies of their shared lives as [[NeverMyFault solely the fault of Fuuta’s predecessors]]. The way she discussed the first two lives Fuuta witnessed is a perfect example of this. She gleefully insulted [[UnwittingPawn Vann]] for being naive enough to slay a peaceful herbalist in the name of his religion, since [[NiceJobBreakingItHero she was just trying to make a cure for an epidemic]]. On the other hand, when Van’s predecessor Fone attempted to save his innocent friend from being a HumanSacrifice at the hands of Stona, ‘’Kouko’s’’ past life, he was ‘’still’’ in the wrong. Kouko framed the institutionalized bloodshed as [[NeccesarilyEvil something the common people demanded]], and blamed Fone for starting the [[FullCircleRevolution bloody revolution]] that started when he didn’t stand by and let his friend die. As she actually talks to Fuuta about his perspective, Kouko [[CharacterDevelopment gradually comes to realize that things weren’t as black and white as she thought]].