History PoorCommunicationKills / AnimeAndManga

* In ''Manga/FullmetalAlchemist'', Hohenheim could have said, for instance, "Alphonse. Edward. Dad has something very important to do and might be gone for a long time. Take care of each other and your mom until I get back okay?" Instead, he gives his children what amounts to a DeathGlare with the expressions on Al and Ed's face making it look like they think their father hates them and having abandonment issues when their mom dies. [[SarcasmMode That's good parenting right there]]. This might have been intentional, however, given how much Hohenheim hates himself, and it could have also been meant to be a deterrent to keep them from seeking him out and getting themselves killed.

* A filler arc of ''Manga/{{Naruto}}'' ended with the 6 Tails being captured, likely entirely because ''no one decided to warn him about the Akatsuki''. Add to that Utakata being to afraid to tell any of the heroes that he's a Jinchuuriki in the first place in the end did more harm than good.

* ''Manga/DetectiveConan'':
** The reason why Kogorou and Eri broke up and became estranged. After a ShootTheHostage situation where Kogorou shoots at Eri's leg to force the hostage taker to abandon her, Eri (who understood Kogorou's intent) still goes all the trouble to cook dinner for him despite her hurting leg. Kogorou's is upset and tells her that with her level of cooking, she can go to bed instead. Eri was hurt that she got yelled by her husband for trying to care for him despite the bad experience and pain she just suffered from. Kogorou, on the other, was actually mad at the fact that she's not resting like she should have, but conveyed his message in his usualy clumsy way, leading to the break-up.
** One case had an injured American tourist recuperating in a Japanese household and falling in love with a young woman. Because of a mouth injury, at first he could only communicate by writing out Japanese phrases phonetically. As he was leaving, the young woman asked if he loved her, and he wrote down the word "shine", referring to his earlier words that he wanted a "shining bride", but which she quite naturally interpreted as "shi-ne," which happens to be Japanese for "die". The woman committed suicide after he left, and when he came back he ended up murdering her father and a family friend in revenge. WhatAnIdiot.
** Another one: A manager murders the lead singer of her rock band because he was an abusive {{Jerkass}}. It turns out that the singer was in love with the manager, but was upset over her getting rhinoplasty because he liked her the way she was. His rude behavior was him lashing out when he was really mad at himself for inspiring her to change herself just to please him.
** Only barely averted in a more recent story about a wife who tends to go overboard and her fed-up husband who thought she was ruining his relationships with his workmates by emailing them with her suspicions she was actually thanking them for taking him out on camping trips but to be careful because of his rare blood type; because they didn't want to accidentally hurt him they stopped asking him out. Unfortunately he didn't realize this until after ''he tricked her into attacking him to cure his hiccups so he could kill her''. Fortunately she survived and even forgave him -- after all they're going to be parents!
** A woman killed her sister because she stole her boyfriend. Turns out the boyfriend was actually the one who initiated everything by falling for his girlfriend's sister and telling the sister to pretend that she was the one who initiated things, not the guy.

** The [[Anime/GenesisClimberMospeada Third Robotech War]], between the Invid of the Regis occupying Earth and the Robotech Expeditionary Force trying to reclaim it, comes entirely from both sides ''refusing'' to talk things out in spite of the Invid's occupation being relatively peaceful (as long as you don't oppose them or try to get your hands on Protoculture without their permission, they leave you alove, and they even repaired the damage done to Earth by the Zentraedi bombardment). This is actually {{Justified}}: the Invid Regis thinks of Humans as barbarians who can't understand the marvels of Protoculture and the dangers of having it (and is perfectly right about the dangers), while the REF has just won a very destructive conflict with the Regent's Invid, who devastated the Robotech Masters' former empire and their homeworld of Tirol, and have no reason to think that the Regis' faction, having suffered the same things the Regent's has at the hands of the Masters, are any different. [[spoiler:That and the REF was being covertly manipulated by the Haydonites, the ancient enemies of the Invid, but nobody knew until, during the final battle, the Regis recognized a few pieces of Haydonite tech being used by the REF.]]

* In the ''Anime/{{Pokemon}}'' movie ''Anime/PokemonLucarioAndTheMysteryOfMew'', poor communication between a few non-villainous scientists and a kleptomaniac Legendary who supposedly could have ''[[PsychicPowers read their minds]] at any time'' resulted in a giant tree nearly killing half the cast and [[spoiler:Lucario KilledOffForReal]].

* Kanade Tachibana in ''Anime/AngelBeats'' fails to express that disappearing isn't necessarily a bad thing. Bad enough that it's caused a war with a nearly 100% death toll for all its participants, ''regularly''. It's a good thing nobody stays dead there.

** Sayaka hates Homura because she thinks Homura [[spoiler:deliberately waited until after Mami was killed before showing up to save the day]]. Madoka was there and knows that [[spoiler:Mami tied Homura up with magic ribbons that only [[NoOntologicalInertia dissipated when Mami died]]]], but is unable to speak up before Sayaka leaves.
** ''Anime/PuellaMagiMadokaMagicaTheMovieRebellion'' much of the plot is driven by the fact that [[spoiler:Homura misunderstood what Madoka meant when she says she would never want to be apart from everyone she loves. Ultimate Madoka ''isn't'' apart from everyone she loves, they just can't see her unless they join her in her magical girl heaven, but Homura takes it to mean that Madoka ''didn't want'' to make that sacrifice in the first place(or perhaps regrets it; in one timeline, Madoka's LastRequest was for Homura to not let her become a magical girl). On the other hand, during the end of the anime when Homura asked Madoka if she was alright with being forgotten about, Madoka never really answered yes or no (though the implication was that she would willingly bear with it to save people). The result is that Homura concludes that Madoka is not happy with her ascension to godhood and, [[IWantMyBelovedToBeHappy wanting to make Madoka happy no matter the consequences]], [[LoveMakesYouEvil she undoes Moadoka's sacrifice, usurps her god powers, and essentially becomes the Devil.]]]]

* In ''Manga/YuunAndTheHauntedHotSprings'', this is what kicks off the conflict between the Yuragi Inn and Ouga. Ouga is completely unwilling to either talk things out calmly with the inhabitants of the Inn or consider the possibility that [[spoiler: Yuuna isn't the Garandou spirit that killed her and so many people in the past, and that there might be other explanations for Yuuna having Garandou's spiritual wavelengths.]] Ouga's stubbornness and tunnel vision would have resulted in [[spoiler: Kogarashi's death at her hands if Yuuna haven't gotten Nonko, the Hiogi Estate and the Chuuma Ninja on the inn's side.]]

* ''Franchise/{{Gundam}}'':

* ''LightNovel/Gamers2015'' is built on it, but instead of drama, PoorCommunicationKills is PlayedForLaughs as everyone has completely convinced themselves there is a LoveDodecahedron forming, with each person thinking a different combination! [[spoiler:In reality, nothing of the sort is actually happening.]]

* In the 2018 anime adaptation of ''VideoGame/MonsterStrike'' This troupe combined with her LeeroyJenkins attitude makes up Lucifer's FatalFlaw. A good portion of the conflict in the Angels arc only happens because of this. Almost every problem could have been avoided had Lucifer just explained her actions and reasonings and not take such impulsive and reckless methods. [[spoiler: She discovered that their leader is a traitor who is plotting against Heaven. However she refuses to tell any of her friends her goal or his true identity and takes matters into her own hands. She gets branded a traitor as a result.]] Even after her friends believe that she has to have a good reason for her actions and gives her several chances to explain herself. Instead of doing so, she gives each of them a NoHoldsBarredBeatDown with the exception of Raphael. Made even worse is that upon learning the truth, her fellow archangels shown that they would have given her their full support if she had just bothered to explain herself.
** The second half of the Angels arc also suffers from this. Both Metatron and Sandalphon have been sent to find Lucifer following her disappearance at the end of the first arc. While they had orders to keep their intentions secret, they still needlessly antagonized the other four archangels by constantly talking down to them simply because they were associated with Lucifer and making them incredibly hostile and suspicious towards them.
*** In fact, in the following arc, the BigBad gives Lucifer a ReasonYouSuckSpeech, calling her out on this and her LeeroyJenkins attitude, and how it has been responsible for making her friends suffer.

* In the 2018 anime adaptation of ''VideoGame/MonsterStrike'' This is Lucifer's FatalFlaw. A good portion of the conflict in the Angels arc only happens because of this. Almost every problem could have been avoided had Lucifer just explained her actions and reasonings. [[spoiler: She discovered that their leader had betrayed the Almighty and is infact ploting against Heaven. However she refuses to tell any of her friends her goal or his true identity and takes matters into her own hands. She gets branded a traitor as a result.]] Even after her friends believe that she has to have a good reason for her actions and gives her several chances to explain herself. Instead of doing so, she gives each of them a NoHoldsBarredBeatDown with the exception of Raphael. Made even worse is that upon learning the truth, her fellow archangels shown that they would have given her their full support if she had just bothered to explain herself.
** The second half of the Angels arc is also pretty bad. Both Metatron and Sandalphon have been sent to find Lucifer following her disappearance at the end of the first arc. While they had orders to keep their intentions secret, they still needlessly antagonized the other four archangels and making them incredibly hostile towards each other.
*** In fact, in the following arc, the BigBad gives Lucifer a ReasonYouSuckSpeech, calling her out on this and how it has been responsible for making her friends suffer.

* In the 2018 anime adaptation of ''VideoGame/MonsterStrike'' A good portion of the conflict in the Angels arc only happens because of this. Almost every problem could have been avoided had Lucifer just explained her actions and reasonings. [[spoiler: She discovered that their leader had betrayed the Almighty and is infact ploting against Heaven. However she refuses to tell any of her friends her goal or his true identity and takes matters into her own hands. She gets branded a traitor as a result.]] Even after her friends believe that she has to have a good reason for her actions and gives her several chances to explain herself. Instead of doing so, she gives each of them a NoHoldsBarredBeatDown with the exception of Raphael. Made even worse is that upon learning the truth, her fellow archangels shown that they would have given her their full support if she had just bothered to explain herself.

* In the 2018 anime adaptation of ''VideoGame/MonsterStrike'' A good portion of the conflict in the Angels arc only happens because of this. In the first arc, Lucifer discovers that their leader is a traitor who has betrayed the Almighty and wants to take him down. However she refuses to tell any of her friends her goal or his true identity and takes matters into her own hands. She gets branded a traitor as a result. Yet her friends believe that she has to have a good reason for her actions and gives her several chances to explain herself. Instead of doing so, she gives each of them a brutal beatdown with the exception of Raphael who she still gave her a difficult choice. Made even worse is that upon learning the truth, her fellow archangels shown that they would have given her their full support if she had just explained herself.
** The second half of the Angels arc is also pretty bad. Both Metatron and Sandalphon have been sent to find Lucifer following her disappearance at the end of the first arc. While they had orders to keep their intentions secret, they still needlessly antagonized the other four archangels and making them incredibly hostile towards each other. It takes a brutal fight between the two sides and one mind reading session later to clear things up.

** Yukariko blames Nao for attacking her after the above revelation, in reality [[WoundedGazelleGambit an illusion projected by her CHILD]]. Nao, already a bitter, cynical girl by nature, assumes the [=HiME=] coming to confront her about attacking Yukariko are attacking her first, and [[EyeScream loses an eye in the resulting fight]], firmly shoving her from Anti-Hero into an antagonist slot. Worse, the other protagonists don't realize that Yukariko never actually reported to the nurse's office(which she would have done if she had actually been injured) until much later, when Mai discovers this by chance.

* In ''Manga/TheMuteGirlAndHerNewFriend'', Mashiro, the eponymous mute girl, must communicate by writing on a notepad. Unfortunately, no one thought to tell the cafeteria staff about that, and the lunch lady yells at her for drawing while in line when Mashiro's trying to order. Luckily for Mashiro, Kokosaki, her new friend, can read Mashiro's mind and orders for her, but one would think that a more permanent solution would be to tell the lunch lady that Mashiro can't speak.

** Yukariko blames Nao for attacking her after the above revelation, in reality [[WoundedGazelleGambit an illusion projected by her CHILD]]. Nao, already a bitter, cynical girl by nature, assumes the [=HiME=] coming to confront her about attacking Yukariko are attacking her first, and [[EyeScream loses an eye in the resulting fight]], firmly shoving her from Anti-Hero into an antagonist slot.

** A more serious example occurs when Luffy and Usopp were arguing about whether to keep the Going Merry, who was beyond fixing. Usopp misinterprets Luffy's decision to not fix Merry as "dumping" whatever became useless (and Usopp had been dealing with confidence issues since the beginning). Usopp fails to mention that [[spoiler:he believes that the ship is ''sentient'']] which goes a long way to explain his behavior. Luffy also tells Nami to stay out of the argument when she mentions that Luffy had a hard time coming to the decision, a fact that might have made Luffy seem a bit more sympathetic.

* ''Anime/Danganronpa3TheEndOfHopesPeakHighSchool''. Seiko and Ruruka were great friends, but following [[spoiler:their expulsion from Hope's Peak Academy]], both got completely different ideas of one another and never spoke to each other again. Come the events of ''Side:Future'', they have a huge fight, and [[spoiler:they both died before they could work things out]].

* In ''Anime/{{Shirobako}}'', [[TheLoad Tarou]] ends up causing a schism between the 2D and 3D departments of the studio by poorly relaying messages about who is responsible for doing an important cut that involves an explosion. He exacerbates the situation by calling Aoi for help when she's out drinking with her friends, and fails to make it clear that this is a serious problem. As a result, she assumes he's just fooling around and hangs up on him, not realizing the truth until the next time she comes to work.