History YMMV / AkumaNoRiddle

* HilariousInHindsight: One of the rumors about Class Black is that it is a class of idol girls. Some of the assassins are voiced by idol seiyuus. Special mention goes to Takechi who is an {{Expy}} of [[TheIdolMaster Hibiki Ganaha]] and even has the [[Creator/ManamiNumakura same seiyuu]]. This also crosses with WhatTheHellCastingAgency, as [[AzumiAsakura Isuke]] was once a [[TheIdolMaster shy, androphobic idol girl]]. Doubles as a CastingGag.

* DieForOurShip: Several Suzu/Kouko fans tend to dislike the man Suzu had a previous relationship with, generally over how he abandoned her for another woman.

* {{Shipping}}: All roommates are commonly paired together: Tokaku and Haru, Isuke and Haruki, Kouko and Suzu, Chitaru and Hitsugi, Shiena and Otoya, Sumireko and Banba. Nio, who doesn't have a roommate, is instead paired with the chairwoman Yuri, who she shares a lot of subtext with.

* TheyWastedAPerfectlyGoodCharacter: Out of all the assassins in the anime, [[spoiler:Shiena]] is with the least characterization. Her DarkAndTroubledPast of [[spoiler:being bullied and her being a BullyHunter]] are never brought up. You'll have to read the manga to know more about her. Shiena is also the only assassin who doesn't have an ImageSong of her own, not even as a bonus track on the CDs.

** Before the last few episodes revealed the whole deal behind Haru's situation, it was commonly speculated that she was just a ruthless killer in disguise, or a living training target for the assassins, or various other similar theories.

* MemeticMutation: "[[VideoGame/MetalGearRisingRevengeance Nanomachines]], Tokaku." Later changed to: "[[spoiler: [[AssPull Titanium ribs]]]], Tokaku."

* AssPull: [[spoiler:The EverybodyLives finale. Especially since that means the five supposed deaths, two of which happened in episode 6, were all given an UnexplainedRecovery, except Haru, who survived in the end because she had ''metal in her ribs''.]]
* BestBossEver: [[spoiler:Hanabusa]].
* BrokenBase: The [[spoiler:EverybodyLives ending has split fans, saying that it was not only an AssPull, but also served to make the rest of the show's events pointless. Others are more forgiving since the alternative would have been one hell of a DownerEnding to an already bleak series]].
** There is also some debate whether the show is actually {{Yuri}} or just a show with yuri subtext, since nothing really rises above subtext.[[spoiler: The only kiss to happen was Haru giving Tokaku oxygen so she didn't drown.]]
*** This only applies to the anime as the manga is much more blatant about the girls relationships and [[CastFullOfGay orientation.]]
* EnsembleDarkhorse[=/=]DracoInLeatherPants: So far, [[ShrinkingViolet Mahiru]]/[[AxCrazy Shiny'a]] [[SplitPersonality Banba]], [[TheTrickster Nio]], and [[TomboyWithAGirlyStreak Haruki]] are rather popular with viewers. In Haruki's case, it helps that she's an {{Expy}} of [[Anime/PuellaMagiMadokaMagica Kyoko]].
** [[spoiler:Takechi and Hanabusa]] in Episode 10. ''Especially'' [[spoiler:Hanabusa]] who was one of the least fan favorites until this episode. She immediately won a sizable amount of love from fans.

* EpilepticTrees: A popular theory was that all the assassins that failed to kill Haru were killed off screen, based on the cliché that [[YouHaveOutLivedYourUsefulness failed assassins become the new target,]] and Takechi and Nio's final scene certainly looks to follow the theory. [[spoiler:Takechi's return after breaking out of prison in Episode 10 proves the theory false. This was even further proven false when everyone, even [[DisneyDeath Hitsugi and Chitaru]], are shown to be alive and well in the final episode.]]
** Another theory is that [[spoiler:since Chitaru drank Hitsugi's poison and died, Shiena, who was shot by Hitsugi with the same poison before, should have been killed by it as well. Again, the ending proved that to be false.]]
** An early theory about why Nio never showed any skin said that she was some sort of robot, in keeping with the futuristic theme, the fact that [[spoiler:Takechi]] seemed terrified of her and the fact that her IdiotHair [[ArsonMurderAndJaywalking stayed perfect even at the pool]].
** The [[spoiler:reveal that the Kuzunoha clan could create illusions and the ending had half the fandom theorizing that Tokaku wished that everyone was alive and well in the end, and had that wish granted via the Kuzunoha's illusion powers.]]
* EvilIsSexy: Since all the assassins are attractive, all of them count. Particularly Isuke [[spoiler:and Hanabusa]].
* FanPreferredCouple: Fans are actually pretty quick in shipping roommates together for this series, but going by all the Isuke x Haruki art, it seems this particular pairing is very popular among the fanbase.
* FoeYay: Not surprising since the assassins are [[FriendlyEnemy friendly enemies]] to each other to some degree. The most obvious is Nio to Tokaku and Haru.
* HetIsEw: Suzu's past relationship with a man. Also counts as DieForOurShip as Suzu[=/=]Kouko shippers tend to dislike that man for abandoning her.
* HilariousInHindsight: One of the rumors about Class Black is that it is a class of idol girls. Some of the assassins are voiced by idol seiyuus. Special mention goes to Takechi who is an {{Expy}} of [[TheIdolMaster Hibiki Ganaha]] and even has the [[Creator/ManamiNumakura same seiyuu]]. This also crosses with WhatTheHellCastingAgency, as [[AzumiAsakura Isuke]] was once a [[TheIdolMaster shy, androphobic idol girl]].
** Doubles as a CastingGag.
* LauncherOfAThousandShips: [[spoiler:Takechi has been shipped with Shiena, Haru, Mahiru/Shinya, Nio and Hanabusa, and that's when she's only appeared in four episodes.]]
* LesYay: Warranted as it is a Yuri anime.
* MemeticSexGod: [[spoiler:Hanabusa]].
** MemeticBadass: So much so that right after her episode, fans immediately started comparing her to Steven Armstrong of ''VideoGame/MetalGearRisingRevengeance'' due to their revelations (and even ''how'' they revealed themselves) as [[spoiler:being more just than normal humans. Steven showed himself to have nanomachines that can turn him into a giant hulk before he fought the cyborg [[TheProtagonist Raiden]]. In Hanabusa's case, it's ironic because she showed herself to be a powerful cyborg.]] Hence, see MemeticMutation below.
* MemeticMutation: "[[VideoGame/MetalGearRisingRevengeance Nanomachines]], Tokaku." Later changed to: "[[spoiler: [[AssPull Titanium Ribs]]]], Tokaku."
* OT3: Tokaku[=/=]Haru[=/=]Nio and Hitsugi[=/=]Chitaru[=/=][[spoiler:Shiena]].
* {{Shipping}}: Naturally as roommates are paired together by fandom and it's not uncommon to ship assassins who have different rooms. The only one who is not prone to this trope (as she doesn't have a roommate) is Nio. Though in her case, some fans pair her with Tokaku, Haru, the mysterious chairwoman, [[spoiler:and Takechi]].
* TheyWastedAPerfectlyGoodCharacter: Out of all the assassins in the anime, [[spoiler:Shiena]] is with the least characterization. [[spoiler:Her DarkAndTroubledPast of being bullied and her being a BullyHunter in the manga are never brought up.]] She is also the only one who doesn't have an ImageSong of her own. You'll have to read the manga to know more about her.
* TheyWastedAPerfectlyGoodPlot: The reveal that [[spoiler:Nio has full-body marking.]] Some fans were disappointed by this, [[spoiler:believing that it was there to give her some MaleGaze fanservice]] and nothing else. Subsequently, they found [[spoiler:Takechi]]'s reaction in to the whole thing in an early episode to be overexaggerating.
* WhatAnIdiot:
** Haru often takes her naivete to ludicrous levels. She's well aware that nearly everyone in the class is out to kill her, yet sees absolutely nothing wrong with trying to befriend said people whilst ''alone'' with them. In episode 3, [[spoiler:she also doesn't alert Tokaku upon getting the 48 hour notice -- as in, the ''only'' person who could conceivably protect her. This nearly gets her killed.]]
** Taken further in Episode 4, where [[spoiler:Haru sees one of her phone straps - the ones she gave to her ''assassin classmates'' - attached to a book in the hidden library. Her first response is to pull it out, despite already knowing that whoever was behind the active notice was proficient with explosive traps.]]

* HilariousInHindsight: One of the rumors about Class Black is that it is a class of idol girls. Some of the assassins are voiced by idol seiyuus. Special mention goes to Takechi who is an {{Expy}} of [[TheIdolMaster Hibiki Ganaha]] and even has the [[ManamiNumakura same seiyuu]]. This also crosses with WhatTheHellCastingAgency, as [[AzumiAsakura Isuke]] was once a [[TheIdolMaster shy, androphobic idol girl]].

** MemeticBadass: So much so that right after her episode, fans immediately started comparing her to Steven Armstrong of ''MetalGearRisingRevengeance'' due to their revelations (and even ''how'' they revealed themselves) as [[spoiler:being more just than normal humans. Steven showed himself to have nanomachines that can turn him into a giant hulk before he fought the cyborg [[TheProtagonist Raiden]]. In Hanabusa's case, it's ironic because she showed herself to be a powerful cyborg.]] Hence, see MemeticMutation below.
* MemeticMutation: "[[MetalGearRising Nanomachines]], Tokaku." Later changed to: "[[spoiler: [[AssPull Titanium Ribs]]]], Tokaku."

** MemeticBadass: So much so that right after her episode, fans immediately started comparing her to Steven Armstrong of ''MetalGearRisingRevengeance'' due to their revelations (and even ''how'' they revealed themselves) as [[spoiler:being more just than normal humans. Steven showed himself to have nanomachines that can turn him into a giant hulk before he fought the cyborg [[TheProtagonist Raiden]]. In Hanabusa's case, it's ironic because she showed herself to be a cyborg.]] Hence, see MemeticMutation below.

** [[spoiler:Takechi and Hanabusa]] in Episode 10. ''Especially'' [[spoiler:Hanabusa]] who was one of the least fan favorites until this episode. Boy, she showed them.

* MemeticBadass[=/=]MemeticSexGod: [[spoiler:Hanabusa]].

* LauncherOfAThousandShips: [[spoiler:Takechi has been shipped with Shiena, Haru, Mahiru/Shinya, Nio and Hanabusa, and that's when she's only appeared in three episodes.]]

** Another theory is that [[spoiler:since Chitaru drank Hitsugi's poison and died, Shiena should have been killed as well. Again, the ending proved that to be false.]]
** An early theory about why Nio never showed any skin said that she was some sort of robot, in keeping with the futuristic theme, the fact that Takechi seemed terrified of her and the fact that her IdiotHair [[ArsonMurderAndJaywalking stayed perfect even at the pool]].

** Another theory is that [[spoiler:since Chitaru drank Hitsugi's poison and died, it should have killed Shiena as well. Again, the ending proved that to be false.]]

* FoeYay: Not surprisingly, but mostly Nio to Tokaku and Haru.
* HetIsEw: It certainly gives off this vibe, even if the Yuri is very subtle. The only heterosexual relationships we see are: a) The parents who let their children starve to death (Isuke), b) the man who left his lover because [[ItMakesSenseInContext she got too young for him]] (Suzu) and c) the parents who are dead (Tokaku, Haru and others). It is also telling that the most compassionate character with the most stable relationship in the story is a gay hitman.

** An early theory about why Nio never showed any skin said that she was some sort of robot, in keeping with the futuristic theme, the fact that Takechi seemed terrified of her and the fact that her IdiotHair stayed perfect even at the pool.

* FoeYay: Nio to Tokaku and Haru.

** There is also some debate whether the show is actually a yuri show or just a show with yuri subtext, with nothing really rising above subtext.[[spoiler: The only kiss to happen was Haru giving Tokaku oxygen so she didn't drown.]]

** There is also some anger at the lack of Yuri, with nothing really rising above subtext.[[spoiler: The only kiss to happen was Haru giving Tokaku oxygen so she didn't drown.]]
* EnsembleDarkhorse: So far, [[ShrinkingViolet Mahiru]]/[[AxCrazy Shiny'a]] [[SplitPersonality Banba]], [[TheTrickster Nio]], and [[TomboyWithAGirlyStreak Haruki]] are rather popular with viewers. In Haruki's case, it helps that she's an {{Expy}} of [[Anime/PuellaMagiMadokaMagica Kyoko]].

** Haru often takes her naivete to ludicrous levels. She's well aware that nearly everyone in the class is out to kill her, yet seems absolutely nothing wrong with trying to befriend said people whilst ''alone'' with them. In episode 3, [[spoiler:she also doesn't alert Tokaku upon getting the 48 hour notice -- as in, the ''only'' person who could conceivably protect her. This nearly gets her killed.]]

* AssPull: [[spoiler:The EverybodyLives finale. Especially since it also included two characters who, unlike the other failed assassins, were killed on-screen. Special mention goes to Haru who survived in the end because she had ''metal in her ribs''.]]

* AssPull: [[spoiler:The EverybodyLives finale. Especially since it also included two characters who, unlike the other failed assassins, were killed on-screen. Special mention goes to Haru who survived in the end because she had ''metal ribs'']]
* BrokenBase: The ending has split fans, some calling it bullshit, especially the [[spoiler: EverybodyLives]] part. Others are more forgiving since the alternative would have been one hell of a DownerEnding.

** Taken further in Episode 4, where [[spoiler:Haru sees one of her charm pendants - the ones she gave to her ''assassin classmates'' - attached to a book in the hidden library. Her first response is to pull it out, despite already knowing that whoever was behind the active notice was proficient with explosive traps.]]