History Characters / AssassinationClassroomMainBuilding

!!!'''Voiced by:''' Creator/AnriKatsu (Japanese, TV anime), Creator/JoshGrelle (English)[[labelnote: Foreign [=VAs=]]] Aldo Ramírez (Latin American Spanish), Hector Navarro/Guillermo Genovés/Francesc Anyo (European Spanish), Bruno Meyere (French), Oliver Wronka (German), Creator/DavideGarbolino (Italian)[[/labelnote]]

!!!'''Voiced by:''' Creator/HideoIshikawa (Japanese, vomic), Creator/ShowHayami (Japanese, TV anime), Chris Rager (English), Creator/ArturoMercadoJr (Latin American Spanish)
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/principal_asano_tranparent.png]]
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!!!'''Voiced by:''' Creator/MamoruMiyano (Japanese, TV anime), Creator/MicahSolusod (English), Eduardo Martínez (Latin American Spanish)
[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/gakush_asano.png]]
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!!!'''Voiced by:''' Creator/AnriKatsu (Japanese, TV anime), Creator/JoshGrelle (English)

* TheRival: To Isogai in the first-semester finals arc, regarding social studies.

!!!'''Voiced by:''' Creator/KaitoIshikawa (Japanese, TV anime), Justin Pate (English)

!!!'''Voiced by:''' Teppei Akahira (Japanese, TV anime), Creator/AaronRoberts (English), Víctor Kuri (Latin American Spanish)

!!!'''Voiced by:''' Shun Takagi (Japanese, TV anime), David Trosko (English)

!!!'''Voiced by:''' Creator/TakuyaSato (Japanese, TV anime), Creator/ChristopherWehkamp (English), César Echeverría (Latin American Spanish)

!!!'''Tanaka voiced by:''' Hiroki Gotou (Japanese, TV anime), Creator/ChrisGuerrero (English)\\
'''Takada voiced by:''' Masahito Yabe (Japanese, TV anime), Creator/DallasReid (English)

!!!'''Voiced by:''' Kurumi Mamiya (Japanese), Creator/LindsaySeidel (English)
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* AbusiveDad: He punches Gakushuu in Chapter 123 / Season 2 Episode 12 after the latter deliberately provokes him while he's in a very emotional state of mind. It should be noted that Gakushuu's behavior towards him isn't that different either; he casually kicked a soccer ball towards his father's face earlier. Though Gakuho blocked the ball quite easily. {{Subverted|Trope}} [[spoiler: when it's revealed that Asano is actually a DotingParent who wants his son to do his best. It's just that he doesn't like to be so sentimental about it, although he does like to endlessly talk about his son.]]

* MotiveDecay: When he first appears, he opposes Class E because he wants to figure out their secret (Koro-sensei) in hopes that it will give him some leverage he can use against his father. After Class A loses their bet on the First Semester Finals however, he becomes focused on defeating Class E for the sake of avenging his wounded pride.

* MotiveDecay: When he first appears, he opposes Class E because he wants to figure out their secret (Koro-sensei) in hopes that it will give him some leverage he can use against his father. After Class A loses their bet on the First Semster Finals however, he becomes focused on defeating Class E for the sake of avenging his wounded pride.

* KickTheSonOfABitch:
** He fires Takaoka for his violent way of teaching.
** [[spoiler:After Ikeda's death, he brainwashed the bullies who drove him to suicide into becoming addicted to gambling, completely ruining their lives in the process.]]

* {{Bishonen}}: Asano Jr. is only one of two good looking students on the main campus.

* {{Bishonen}}: Not as much as Asano due to his rather odd hairstyle.

* TriangRelations: With Maehara as A, her as B and Seo as C, a type 4... Until the rest of Class 3-E decided to get involved, at which point it became nothing.

* AmbiguousDisorder: As shown how extreme he is by proving his current education philosophy right after the death of one of his former students hints at the severe emotional imbalances as a result of repressed grief and severe Post-Traumatic Stress Disorder. Also, he can be considered a bit odd prior to his past as a cram school teacher.

* EstablishingCharacterMoment: In his very first appearance, Asano explains that he wants to line up all the colors of a Rubik's cube quickly, using a method anyone can do. The answer? He simply jams a screwdriver in to take it apart and then put them back together. This moment shows that not only he's willing to use ''any'' method to win, but show how he's willing to brainwash his students to follow his dogmatic educational system.

* RubiksCubeInternationalGeniusSymbol: Played with. Asano's first proper appearance has him carrying a Rubik's cube, but instead of solving it, he breaks it apart, and reasons that breaking it apart by force before putting it back together is the most logical way of solving it.
* RuleOfSymbolism: As seen in his EstablishingCharacterMoment, Asano's "method" of solving the Rubik's Cube shows his willingness to teach students to follow his brutal dogmatic educational system, by using ''any'' means necessary. Also, by using this tactic repeatedly, he ends up causing bad psychological damage to the same students he's trying to teach, to where it'll eventually fracture their minds, much like how the pieces of the Rubik''s Cube will eventually get damaged to the point where they can't fit back altogether.

* EveryoneHasStandards: Arrogant [[{{Jerkass}} Jerkassess]] of epic proportions they might be most of the time, but The "Five Virtuosos" are ''horrified'' at [[TheSociopath Principal Asano]]'s suggestion that they should have [[TamperingWithFoodAndDrink poisoned]] the food Class 3-E was selling during the School Festival.

* ArchnemesisDad: He treats his son pretty much how you'd expect given how he treats his students. His son responds in kind. They have a lot in common. Although it's shown in chapter 94 that [[EvilerThanThou the father is worse.]]

** When the government [[spoiler:exposes Koro-sensei as part of their final assassination plan]], rather than take the easy way out and paint himself as a victim of the situation, he instead defends his actions and manipulates reporters into writing defensive articles.

** Anything he can do to ensure that his system works will be done, from personally teaching the content of the upcoming midterms to all students except Class 3-E to hiring a SadistTeacher to make sure Class 3-E's grades drop dramatically.

* PetTheDog: In chapter 160 [[spoiler: it's revealed he had a soft spot for the late Aguri Yukimura. He goes on to say that she had endless amounts of vitality and a great passion for education, and she would have been an outstanding educator in a few more years, had it not been for a [[TearJerker regrettable]] [[MoralityPet loss]].]]

* AdaptationalLateAppearance: In the manga, he first appeared in chapter 23 as Kaho Tsuchiya's on-and-off boyfriend, before getting a proper introduction in chapter 50 along with the other Four of the Five Virtuosos. Since Kaho is AdaptedOut in the anime, he makes his first appearance alongside the other Virtuosos.

* TheCameo: José shows up in chapter 102. He is one of the Brazillian soccer fans who are pissed of by Koro-sensei mentioning [[ShoutOut 7 to 1]].
* {{Dumb Muscle}}s: The four exchange students are invited to the school by Asano Jr. for the sports festival, so Class 3-A has an athletic and physical advantage against Class 3-E. The four leave the thinking to Asano.

* DissonantSerenity: When speaking to Takaoka about why he failed to use fear to teach his class effectively, [[NightmareFuel there is the imagery of a centipede crawling down Takaoka's throat]]. And Takaoka is a trained military soldier!

* IdiotBall: Beating down the confidence of the only people who can end a threat to the world is a terrible idea. Should they fail due to lack of self-confidence resulting from a systematic demoralization, then he's equally culpable for the destruction of humanity in order to preserve his ideals of academic excellence even if at the cost of emotional development. Worse, if they ''do'' succeed, then Irina, a rich, efficient assassin who has the favor of governments, the assistance of several of the world's best assassins, and an obvious reason to ''hate'' him for making her students' life a living hell, has every reason to ruin/kill him with every resource available to her with little oversight necessary.

* InstantExpert: He surpassed a black belt in karate in three days after losing once because he felt that losing twice would be like dying.

* NamedAfterSomebodyFamous:
** See the matching entry at the top of the page. Ironically, he is named after the person whose death by seppuku UsefulNotes/The47Ronin sought revenge over.
** Not as ironic as it may seem: the guy was considered rather abrasive and quite a nasty piece of work both in contemporary sources and since. That he got judicially murdered wasn't that much of a surprise, considering the stuff he pulled. The honor doesn't lie in the 47 defending the memory of a just man, but keeping their word and allegiance beyond his death.

* NoHoldsBarredBeatdown: [[spoiler:To the four foreign exchange students, who are largely built athletes, but still teenagers.]]
* NonActionBigBad: So far he hasn't shown any extraordinary physical abilities, though with his charisma and manipulation he is a significant impediment regardless. [[spoiler:In Chapter 94 the four foreign exchange students find out [[NoHoldsBarredBeatdown the hard way]] that he's a very capable and brutal fighter too.]]

* SkewedPriorities: Asano Sr. is more interested in preserving his system than ''keeping Koro-sensei from destroying the world.''

* SoreLoser: In the most extreme way possible. The best example is in chapter 123. [[spoiler:Class 3-A lost because they couldn't concentrate on the second half of the exam as they lost the bloodlust he whipped up on them. When his son chews out his class, he doesn't take it and slaps him when his classmates begin to respect Class 3-E's growth and even ask him to transfer them to Class 3-E if he's not happy. This also results in everyone in Class 3-A leaving him.]]

* VillainousBreakdown: Suffers from an [[TranquilFury outwardly stoic]] one after [[spoiler:Class 3-E defeats Class 3-A in the second term exams, to the point that Class 3-A has students asking to be put into 3-E to learn from their teaching methods rather than his own. First, he slaps his son hard across the face in full view of the rest of the class, then he attempts to destroy the former's campus, kill Koro-sensei and place Class 3-E in what is essentially a prison.]] Gakushu realizes it and points it out.

* VillainWithGoodPublicity: He's respected and liked by students and teachers from the main campus and has won several awards for his top-notch educational system. At the same time, he treats Class 3-E in a way that violates Japanese school regulations. He not only approves of Takaoka's violent punishment methods until they became ineffective, but he also [[spoiler:beats the hell out of the four exchange students,]] which is definitely illegal and criminal. [[spoiler:Then it all comes crashing down at the epilogue after revelations of his more unsavory methods created a huge backlash that forced him to resign as principal.]]

* ALighterShadeOfBlack: In comparison to his father. Both of the Asano's are rather unpleasant, but whereas Gakushuu is merely extremely prideful and content with proving his superiority, Gakuhou is extremely dogmatic in the belief that his teaching philosophy is correct, and will stop at nothing to prove it. [[spoiler:Fittingly, while Gakushuu knows where to draw the line and drops his antagonism towards 3-E first, Gakuhou will stoop to any low, is DefiantToTheEnd, and doesn't remotely drop his antagonism till the final act of the series.]]

* BadassBookworm: Asano Jr. is unrivaled when it comes to academics. It's revealed that he has the martial art skills to force [[spoiler:the boys of Class 3-E into a pinch]].

* HypocriticalHumor: He insults Okuda for looking like a Hick for her glasses, and ask Teppei for confirmation. Nevermind that he and Teppei wear glasses themselves.

* UnskilledButStrong: He uses a fastball 90% of the time, a fastball that flies at 140 Kilometers per hour. Naturally, 3-E exploits this initially by only using bunts.

* SoreLoser: [[UpToEleven In the most extreme way possible]]. The best example is in chapter 123. [[spoiler:Class 3-A lost because they couldn't concentrate on the second half of the exam as they lost the bloodlust he whipped up on them. When his son chews out his class, he doesn't take it and slaps him when his classmates begin to respect Class 3-E's growth and even ask him to transfer them to Class 3-E if he's not happy. This also results in everyone in Class 3-A leaving him.]]