History YMMV / BlackButler

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* CompleteMonster: [[spoiler:[[{{Plaguemaster}} Lady Hanae Wakatsuki]] is the EvilAunt of Shiori "Kiyoharu" Genpō, who became an ImmortalitySeeker after being rejected by Shiori's father for being infertile. She ends up joining with pharmaceutical executive Shimpei Kujo to experiment on young women obtained via HumanTrafficking to develop various anti-aging drugs, eventually killing Shiori's parents when they get in her way. During one of these experiments, the two discover a drug called Necrosis which agonizingly mummifies people. Hanae decides to test this drug on random people, including a nightclub full of people, her murders soon being nicknamed the Devil's Curse. After [[YouHaveOutlivedYourUsefulness killing Kujo for outliving his usefulness]], Hanae sets up a bunch of Necrosis pills to bomb a mass gathering of world leaders, intending to mummify everybody in a kilometer's radius.]]

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* AlternativeCharacterInterpretation:
** Happens a lot with Ciel, especially due to his extremely different personalities in the two canons (manga Ciel and anime Ciel have a lot of differences). This also happens with a few other characters, but to a lesser degree.
*** Some people think he actually cares about others, and other people think he does not care at all about others or even hates them.
*** Some argue just how much of Ciel's darker tendencies are truly his own and how much they are a result of Sebastian's looming influence and his position as the Queen's Watchdog. On the one hand it's no secret that Sebastian is doing his best to "season" Ciel's soul and on ''two'' instances [[spoiler: tried to kill Ciel when he appeared to give up on his revenge or be too sick to go on]] and the position continuously exposes Ciel to the worst of human nature which leads to him making morally reprehensible decisions himself, especially when it triggers his [[DarkAndTroubledPast PTSD.]] On the other, WordOfGod ''has'' stated multiple times that Ciel is in fact naturally twisted, a trait that he picked up from his father Vincent, and Sebastian has alluded to Ciel's soul having certain properties that he rarely finds in others.
*** Going from the above one particular line from Claude has him note in the lines of how Ciel has traversed through much darkness yet his soul remained uncorrupted. Is Ciel simply a very resilient individual, or was his soul already a shade of black to begin with?
*** Some people consider Ciel to be [[UsefulNotes/{{asexuality}} asexual]], but other fans think he is gay or bisexual.
*** Whether you're a [[{{Shipping}} shipper or not]], he ''has'' [[ShipTease shown hints]] of affection towards [[PuppyLove Elizabeth]]. Despite his maturity Ciel ''is'' only 13 and, similarly to most {{shonen|Demographic}} protagonists, a romantic and/or sexual relationship is the ''last'' thing on his mind. [[HatesBeingTouched Then there's his]] [[DarkAndTroubledPast deeply troubled past...]]
** The topic on Sebastian's true character seem to be quite contentious as well.
*** Sebastian's character itself isn't clear in the first place. His worst traits are that his morality is [[BlueAndOrangeMorality alien]] or [[AboveGoodAndEvil nonexistent]], that he [[CantArgueWithElves thinks most humans are shallow and weak]], and that he likes to ([[CombatAestheticist artfully]]) KickTheDog during his fights or whenever he sees fit. On the flipside, he ''does'' express admiration for HeroicWillpower and [[IntriguedByHumanity finds humanity entertaining]], openly admitting that [[EvenEvilHasStandards demons' malice simply can't]] [[HumansAreTheRealMonsters measure up to humans']]. [[ArsonMurderAndJaywalking Oh, and he likes kinky boots and cats]]. And while he is affirmatively after Ciel's soul and is ''not'' [[DracoInLeatherPants the dashing Bad Boy hero]], his place on the evil spectrum and whether he sees Ciel as anything besides a marinating roast is anyone's guess.
*** There are some people who genuinely believe that Sebastian is [[BecomingTheMask losing himself to his butler persona]] and becoming more human and less cruel.
*** Just how much is manga Sebastian truly a BornLucky godlike InvincibleHero? He is definitely NighInvulnerable and can [[CurbStompBattle curb-stomp]] most humans with flair, but Agni can duel him to a standstill with no supernatural help when Sebastian was ordered to defeat him. Not helping is that only time he's been able to easily trounce a supernatural opponent was with Ronald Knox on the ''Campania'', Grell being able to seriously injure him (leading to him using a clever trick to win the fight) and Undertaker nearly killing him. Sebastian also occasionally struggles to fulfill Ciel's orders due to obstacles that even he can't breeze past, like in the aforementioned fight with Grell and later on when investigating the circus.
*** It could also be questioned how much Sebastian might be holding back in order to maintain the façade, as many moments do hint that he has powers that he can utilize but chooses not to (causing hallucinations and entering dreams being a couple examples). The ''Campania'' arc and the Blue Memory flashbacks establish that Ciel has ordered Sebastian not to use the full extent of his powers. To make things even more complicated, in the Jack the Ripper arc Sebastian states that when Ciel orders him to do something then the contract will ensure that he succeeds. Given that there are several times throughout the manga where Sebastian does explicitly fail at fulfilling Ciel's orders and that Sebastian has tried to eat Ciel twice before the terms of the contract were fulfilled, it calls into question just how powerful the contract is and whether or not it genuinely limits Sebastian's behavior.
** Snake. Does he only repeat what his snake friends say, or can he speak for himself and [[TheQuietOne just chooses not to]] [[ShrinkingViolet out of shyness]]? It's worth noting that he has spoken for himself a handful of times in the manga, the first time being [[http://40.media.tumblr.com/e2332b94645fcc9634c7d7b9d3a3c58e/tumblr_inline_nlhrtx1qF41r6qd3h_400.png this]] panel in an early chapter.
** The {{Hellhound}}. Is he sapient, or does he only have the mind of a dog?
** Grell's motivations for becoming Jack the Ripper. She tells Angelina that it's because she can relate to and sympathize with Angelina's desire and inability to have children, but aside from a comment to Sebastian she never brings this up again and tends to be at best dismissive of the child characters she interacts with. So was she telling the truth, or was she lying to gain Angelina's trust so that she'd let Grell join her? If she was telling the truth, did she change her mind after the Jack the Ripper arc, or is she simply keeping her desire for motherhood closer to her chest? If she was lying, then did she approach Angelina out of boredom, simple desire to kill women (or anyone for the matter), or was she interested in Angelina herself?

** Sebastian and Ciel, ''the main characters'', are also both notoriously [[BaseBreakingCharacter divisive,]] particularly for those who are reading the manga and have gone through now 200 chapters and counting of little to no character development [[labelnote:Explanation]]Sebastian and Ciel were shown to develop into who they are now through flashback chapters, but as far as moving forward in the story they have changed little from when they were introduced nor have they come close to the SeriesGoal of getting revenge on those behind the attack on the Phantomhives. [[/labelnote]]

** Back in the day, many fans, particularly those who were big on yaoi and pairings, treated Grell as though she were a cisgender male, although this is possibly more due to the fact that Grell's status as a trans woman is not properly mentioned or even really alluded to in-story, especially in the official English translation/dub, and only confirmed by WordOfGod via [[AllThereInTheManual extra sources]]. Said WordOfGod became more widely recognized and accepted over time with the rise of trans acceptance, but this persists with some fans due to the ValuesDissonance of having her voiced by a cisgender man in both Japanese and English.

*** Sebastian's character itself isn't clear in the first place. His worst traits are that his morality is [[BlueAndOrangeMorality alien]] or [[AboveGoodAndEvil nonexistent]], that he [[CantArgueWithElves thinks most humans are shallow and weak]], and that he likes to ([[CombatAestheticist artfully]]) KickTheDog during his fights. On the flipside, he ''does'' express admiration for HeroicWillpower and [[IntriguedByHumanity finds humanity entertaining]], openly admitting that [[EvenEvilHasStandards demons' malice simply can't]] [[HumansAreTheRealMonsters measure up to humans']]. [[ArsonMurderAndJaywalking Oh, and he likes kinky boots and cats]]. And while he is affirmatively after Ciel's soul and is ''not'' [[DracoInLeatherPants the dashing Bad Boy hero]], his place on the evil spectrum and whether he sees Ciel as anything besides a marinating roast is anyone's guess.

*** Undertaker is popular despite that among other things, [[spoiler: some see very [[ILoveTheDead weird implications]] about his mortician job...oh, and everything in regards to the bizarre doll experiments.]]