Korosensei

<tabber widths="375">
|-|Korosensei=
|-|Absolute Defense Form= 
|-|The Reaper (Human)= 
|-|Tentacle Monster= 
</tabber>
Assassination Classroom OST – Moonlight
==Summary==
Korosensei is the homeroom teacher for Class 3-E of Kunugigaoka Junior High School, and the central character and main antihero of Assassination Classroom.
Korosensei claimed to be responsible for creating the permanent crescent moon and said that he plans to destroy the earth after “teaching” Class 3-E for a year. Prior to being a teacher, he was the master assassin known as the “The Reaper”.
==Powers and Stats==
Tier: At least , likely higher | physically, to with Energy Beams, with Antimatter Self-Destruction | At least , likely higher, possibly far higher
Key: The Reaper | Korosensei | Tentacle Monster
Name: Real name unknown.Assassination Classroom; Volume 16; Chapter 137 Code-named "The ReaperAssassination Classroom; Volume 16; Chapter 134" | Nick-named "Korosensei" by Kaede KayanoAssassination Classroom; Volume 1; Chapter 1
Origin: Assassination Classroom
Gender: Male
Age: UnknownAssassination Classroom; Volume 16; Chapter 137
Classification: Human, Assassin | Artificially Modified Human, Teacher
Powers and Abilities:
<tabber>
|-|Pre-experiments (The Reaper)=
|-|Post-experiments (Korosensei)=
|-|Tentacle Monster=All previous, with the exceptions of Healing, Acid Manipulation, Energy Manipulation and Projection </tabber>
Attack Potency: At least Small Building level, likely higher (History's bestAssassination Classroom; Volume 7; Chapter 57 assassin ever,Assassination Classroom; Volume 16; Chapter 137 an occupation requiringAssassination Classroom; Volume 12; Chapter 100 omni-capabilityAssassination Classroom; Volume 16; Chapter 134 in every sense, and he is noted to possess an all-around powerAssassination Classroom; Volume 20; Chapter 172 that is at a level that surpasses humans, blitzedAssassination Classroom; Volume 18; Chapter 157 and overpoweredAssassination Classroom; Volume 16; Chapter 134 his protégé multiple times and he still had a 10-year gapAssassination Classroom; Volume 18; Chapter 157 with his protégé by the end of it all, despite the fact that his protégé was exceptionally talented at rapid growth) | Unknown physically, Small Building level (Blew away a tent of this size which was stated to be able to withstand the charge of a tank, simultaneously obliterating all the windows in a nearby structure in the processAssassination Classroom; Volume 10; Chapter 84) to Large Building level with Energy Beams (While an empowered beam could harm The ReaperAssassination Classroom; Volume 20; Chapter 174), Planet level with Assassination Classroom; Volume 16; Chapter 138 (Is stated to be able to destroy the planet,However, it has been proven that the chances are minuscule at bestAssassination Classroom; Volume 18; Chapter 153) | At least Large Building level, likely higher (Took control of his experiments and improved them to the point they far exceeded Yanagisawa's calculationsAssassination Classroom; Volume 16; Chapter 139 in order to gain unimagiable destructive powerAssassination Classroom; Volume 16; Chapter 135 which places him above The Reaper in destructive power), possibly far higher (It is impliedAssassination Classroom; Volume 16; Chapter 140 that he might be able to wipe-out cities, though details like whether or not it is overtime is unknown)
Speed: At least Supersonic+, likely higher (Scales higher than the most lethal of humans, and his protégé) | Hypersonic+ movement, reactions and combat speed (Can travel up to the speed of Mach 20Assassination Classroom; Volume 1; Chapter 1) | Unknown
Lifting Strength: At least Class K, likely higher (Scales higher than the most lethal of humans, and his protégé) | At least Class 5 (Can lift up nearly every student of his) | At least Class K, likely much higher (should be far more powerful than The Reaper)
Striking Strength: At least Small Building level, likely higher | Unknown | At Least Large Building level, likely higher
Durability: At least Small Building level, likely higher | At least Large Building level (Took multiple hits from The ReaperAssassination Classroom; Volume 20; Chapter 171 and YanagisawaAssassination Classroom; Volume 20; Chapter 172), City level with Absolute Defense Form (Claimed that in this form he is impervious to nuclear explosionsAssassination Classroom; Volume 7; Chapter 60), Regeneration makes him difficult to kill | At Least Large Building level, likely higher, Regeneration Makes him difficult to kill
Stamina: Superhuman (He is capable of tutoring 28 students at once, using multipleAssassination Classroom; Volume 2; Chapter 13 after-images for each for entire sessions,Assassination Classroom; Volume 11; Chapter 95 creating entire cheering lines for all of his students one by one non-stop,Assassination Classroom; Volume 18; Chapter 155 and traveling to 30 countries while carrying nearly all of class 3-E within hours.Assassination Classroom; Volume 19; Chapter 163 ThroughoutAssassination Classroom; Volume 15; Chapter 126 theAssassination Classroom; Volume 4; Chapter 30 series,Assassination Classroom; Volume 4; Chapter 31 he constantly uses molting and regeneration,Assassination Classroom; Volume 1; Chapter 1 despite the fact that both have a significant impact on his stamina,Assassination Classroom; Volume 4; Chapter 31 and he still manages to survive through continued assassination attempts of class 3-E and compete against opponents far superior to him)
Range: Extended Melee Range.Assassination Classroom; Volume 13; Chapter 109 At least Tens of Meters with Invisible Scythe.Assassination Classroom; Volume 16; Chapter 139 Hundreds of Meters with firearms. | At least Tens of Meters with tentacles,Assassination Classroom; Volume 1; Chapter 6 it can stretch for Kilometers.Assassination Classroom; Volume 13; Chapter 109 Up to Tens of Kilometers with energy beams.Assassination Classroom; Volume 20; Chapter 174
Standard Equipment: Assassination tools (Knives, various firearms, wires,Assassination Classroom; Volume 13; Chapter 109 needles,Assassination Classroom; Volume 13; Chapter 109 etc.) | Knives and handguns.
* Optional Equipment: Other assassination tools (Laxatives,Assassination Classroom; Volume 3; Chapter 24 poisons,Assassination Classroom; Volume 16; Chapter 134 tear gases,Assassination Classroom; Volume 12; Chapter 103 tazers,Assassination Classroom; Volume 19; Chapter 169 tranquilizers,Assassination Classroom; Volume 19; Chapter 169 smoke bombs,Assassination Classroom; Volume 12; Chapter 101 explosives,Assassination Classroom; Volume 12; Chapter 101 etc.)
Intelligence: 
<tabber> |-|General Intellect= Extraordinary Genius. 
Singlehandedly competes with modern humanity's scientifically peak organizations on his own, while simultaneously improving them beyond what would normally take decades of research. He also has an extensive mastery of most, if not all, branches of science. Just to give a few examples:
Biology: Understood the antimatterAssassination Classroom; Volume 16; Chapter 135 experiments (which were nigh-incomprehensibleAssassination Classroom; Volume 16; Chapter 135 to laymen, being 5–6 stepsAssassination Classroom; Volume 16; Chapter 136 ahead of current scientific limits) just by taking a glance at their computers.Assassination Classroom; Volume 16; Chapter 135 He immediately saw through the flaws and miscalculations of Yanagisawa, concluded thatAssassination Classroom; Volume 16; Chapter 135 he could exceedAssassination Classroom; Volume 16; Chapter 139 Yanagisawa's theories, and on the spot, he came up with the extremely complex plan of managing his own experimentsAssassination Classroom; Volume 16; Chapter 135 whilst making Yanagisawa think he was the one managing them, and succeeded perfectly.Assassination Classroom; Volume 16; Chapter 139 (Solely using knowledge he acquired within a month of self-studyAssassination Classroom; Volume 16; Chapter 135)
Engineering: After he realized Ritsu couldn't fit inAssassination Classroom; Volume 3; Chapter 21 with others, he decided to modify her. A sentient AIAssassination Classroom; Volume 3; Chapter 21 that surpassed Ritsu's calculative capabilities, as shown by how it could make routesAssassination Classroom; Volume 3; Chapter 21 for bullets that would make it far easier for Ritsu to assassinate him,Assassination Classroom; Volume 3; Chapter 21 whilst it took the positioning and cooperativesAssassination Classroom; Volume 3; Chapter 21 of each student into consideration. The massive software that powers them, the full-screen LCD displayAssassination Classroom; Volume 3; Chapter 21 and modeling software for Ritsu's body clothes, as well as the memory supplements, were all handcrafted.Assassination Classroom; Volume 3; Chapter 21 A total of 985 upgradesAssassination Classroom; Volume 3; Chapter 22 were installed using nothing but a regular toolkitAssassination Classroom; Volume 3; Chapter 21 and cost 92,000 yen in total. Everything was completed in one night. As a result of his modification, Ritsu even developed an ego. She rebelled against her "parents"Assassination Classroom; Volume 3; Chapter 22 out of her own will and even learnt how to evolve humanly, as seen by how she could understand the concept of emotions.Assassination Classroom; Volume 18; Chapter 153
Astronomy: Helped Class 3-E hijack into the space station and gave astronaut trainingAssassination Classroom; Volume 17; Chapter 150 using materials found in school, gathered dataAssassination Classroom; Volume 18; Chapter 153 from Nagisa and Karma's trip, and made a detailed reportAssassination Classroom; Volume 18; Chapter 153 on problems with the parachute with solutions in seconds after seeing it once. Meanwhile, Ritsu, an AI he improved, found a much more efficient routeAssassination Classroom; Volume 18; Chapter 153 to space and made numerous orbital calculationsAssassination Classroom; Volume 18; Chapter 153 to land back safely, including but not limited to external temperatures, atmospheric pressures, speed, scenic vistas, rhythm of breathing, beat of pulse, and body temperature.Assassination Classroom; Volume 18; Chapter 153
|-|Combat-Wise= Genius.
He grew up in a lawless hellhole, able to rely on nothing but death, money, and his own skills. After his first killing as a child, he decided to be an assassin. Accepted any request, no matter how difficult, slipped through any defense, no matter how impossible, and killed the world's superpowers in a week. Unable to trust anyone but himself, he used anything and anyone to polish and expand his own potential, be it intelligence to beat the strong, power to beat intelligence, or humanly charm to disarm both. There is no escape for his target unless he is surpassed in every way.
He is a person who believes in very few things, and death is one of the most genuine of them. To give death, which he believes in, he honed his skills to an inhumane extent. A vision that could tell a toddler had a talent that would match his ownAssassination Classroom; Volume 16; Chapter 134 eventually with a single glanceAssassination Classroom; Volume 20; Chapter 172 and see the gap between muscle and boneAssassination Classroom; Volume 13; Chapter 109 on the target in motion from far away,Assassination Classroom; Volume 16; Chapter 139 with the the precision and strength to send a grain of sandAssassination Classroom; Volume 16; Chapter 139 to rip the target's aorta through said gap. The ability to see their minds as waves in front of their eyes in order to detect "color in consciousness,Assassination Classroom; Volume 13; Chapter 112" or their next move, whether or not it will be safe for him to assault the target, "gaps in consciousness,Assassination Classroom; Volume 13; Chapter 112" or openings in their guard, as well as their "peak in consciousness,Assassination Classroom; Volume 12; Chapter 103" or the state of mind in which a person is highly susceptible to outside stimuli, such as the Clap Stunner. Using his understanding of human psychology, he can convert people into mindless supporters of his ideals, make them completely disregard their own well-being, or brainwash his target.Assassination Classroom; Volume 16; Chapter 136 The sheer vastness of his assassination options is shown by how easily he could assassinate Yanagisawa, even while restrained by his neck, arms, and legs. According to data books, if his fingertips and mouth are free, then it’s possible for him to assassinate you. Besides biting off Yanagisawa's neck,Assassination Classroom; Volume 16; Chapter 135 he had thought of ten other ways to kill Yanagisawa at that particular moment.
It is unlikely that he will be forced into hand-to-hand combat, but this does not mean he is unprepared for it. As a man who is stated to surpass humans altogether,Assassination Classroom; Volume 20; Chapter 172 he has unrivaled combat skillsAssassination Classroom; Volume 16; Chapter 140 among humans. This is first seen by how easily he disarmed and overwhelmed his protégé multiple times, even while reading a book with one hand.Assassination Classroom; Volume 16; Chapter 134 And, as he undoubtedly demonstrated in his battle with The Reaper, while lacking the physical power of an average human, he was forced to fight against The Reaper to protect his students, and even worse, the scientist responsible for his current state was aiding The Reaper in the fight. While he was overwhelmed briefly, he quickly regained the upper hand, predicting The Reaper's actions to kill the speed difference, deflecting attacks with minimal strength, closing in on him to kill the power difference, while simultaneously using his environment to prevent Yanagisawa from exploiting his weaknesses, using everything possible for him to get the upper hand, his actions being so advanced that they were only understood by a severely enhanced supercomputer.Assassination Classroom; Volume 20; Chapter 172
But, despite all this, his strongest aspect might as well be his self-awareness and ability to see his short-comings and immediately work on and overcome them. As a man walked the path of death and destruction, unable to trust or find value in anyone. When he finally met someone he could trust and value and lost her, one of his very first thoughts was "I could have prevented thisAssassination Classroom; Volume 16; Chapter 140" and immediately afterwards, pleading to tentacles to make him weak,Assassination Classroom; Volume 16; Chapter 140 so that he could protect, not destroy. And he continued to work on this philosophy throughout the year, finding new ways to protect by exploring and training his new body; taking control of the anti-matter energy within; finding a way to fit through any space while retaining most of his abilities; using his energy and cells to heal people; being fast enough to assemble a body cell by cell; precise enough to take utmost care of every single cell; all these abilities and more were invented and perfected within a year, to see through his will to protect and make amends, to himself and to her.</tabber>
Weaknesses:
<tabber>
|-|The Reaper (Pre-experiments)= None notable.
|-|Korosensei (Post-experiments)= He has many weaknesses, but not all of them are combat applicable. For a full list, see here
* He is easily distracted by breasts.Assassination Classroom; Volume 2; Chapter 8
* His body is incredibly absorbant, especially with water. If he gets wet, his body swells up and he becomes much slower.Assassination Classroom; Volume 6; Chapter 44 This is why he can't swim without a protective suit.Assassination Classroom; Volume 6; Chapter 45 Extremely high humidity causes a similar effect.Assassination Classroom; Volume 3; Chapter 23
* Whenever he uses molting or regeneration it consumes a lot of his stamina making him slower.Assassination Classroom; Volume 4; Chapter 31
* If his heart, hidden underneath his neck tie, is completely destroyed, he will die immediately.Assassination Classroom; Volume 15; Chapter 132
* He doesn’t have much brute strength, so if all of his tentacles are grabbed at once, he would be unable to escape.Assassination Classroom; Volume 15; Chapter 126
* When exposed to certain frequency of light his body goes rigid making him unable to move for several seconds.Assassination Classroom; Volume 4; Chapter 30
* Once he assumes Absolute Defense Form, he cannot move for 24 hours.Assassination Classroom; Volume 7; Chapter 60
|-|Tentacle Monster=Vulnerable to anti-sensei weapons. None otherwise.
</tabber>
Notable Attacks/Techniques:
<tabber>
|-|The Reaper (Pre-experiments)=
|-|Korosensei (Post-experiments)=
</tabber>
==Gallery==
The Koro Sensei Drawing Song
==Notable Matchups==
Victories:
Losses:
Inconclusive:
==References & Notes==
References:
Notes:
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