So that those of us here that don't know Assassination Classroom can follow, the key we are talking about lasts from 16:08 to 20:00 in this video. Anything before that is first key (or technically something inbetween first and third, as he is not fully human, but also not High 8-C yet), anything after that is second key. Only those 4 minutes are third key.
That's the mindset and information on his fighting we have. It's him on a murder rampage trying to test out his powers. This key doesn't exist with a different mindset.
Not what I meant—the Reaper only has a single year left to live in this state. If another being like him exists that he knows has a longer lifespan, he could use her to potentially prolong his life.
He has no reason to assume Bunny has a longer lifespan. Quite the opposite. He knows what the lab has on research in antimatter creatures, because he pretty much guided the research himself, and hence is aware that there is no solution.
Not to mention, he doesnt actively have to talk her down. Just like his student, he's always using skills that induce constant relaxation and complete unawareness of any threat he may pose. Unless she has prior knowledge, Reaper-Sama doesnt even have to decide to influence her, he just does.
SBA says she assumes he is a threat from the get go, so just seeming non-threatening isn't going to work. He would need to actively get her down from a state of threat.
It is double not going to work, as that attribute does no at all apply to this key as the video above shows nicely.
Because they were the guys who kidnapped him and literally tortured him for months on end? I don't see the comparison between a bunny girl and a bunch of evil scientists who had been experimenting on him.
Which would be an argument if he had any other showings, which he doesn't. It's not like he cared about innocents as the Reaper.
Also, he technically may as well assume that the girl trying to kill him does in fact work with the lab guys.
No, he doesn't. Even his basic presence induces pretty good social influencing, and a simple smile or passing word can completely brainwash somebody.
Nope. Can't instantly subvert someone who is trying to kill him.
His best feat with a smile is to get a non-combatant cautious of him from "I won't take your bindings off because you definitely will kill me" to "I won't take your bindings off because I'm cautious about you trying to kill me".
And in his tentacle monster form the whole thing is kinda more difficult as he looks like a monster.
Either way, stabbing him with normal weapons that aren't Anti-Sensei won't kill him, even if they don't dissolve within him. Given she also has an AP disadvantage (since Koro scales pretty far above the guy who did the High 8-C feat), just stabbing at him conventionally isn't going to work.
NLF. He has no feats of being immune against anything of that pay grade.
It's not a matter of stats, it's a matter of fundamental physiology. Normal metal and explosives just doesn't kill him, Anti-Sensei materials are specifically designed to split his cells like tofu, which is the point of using them.
Also NLF.
And provably wrong. In the final battle we see tentacle hits and stuff injure Korosensei and pose a threat to him. Those don't have Anti-Sensei properties.
He isn't an immortal or anything.
