I'll address this later in this reply.
I also addressed this above
here. Fire Emblem magic is literally just sans's dura neg
in the sense that it ignores all defensive stats. Lyn has resistance to this magic, allowing her to take them as she would any normal physical attack.
So, she would be taking sans' hits as regular hits, which isn't good for sans, given that he scales WAY below his rating, and Lyn scales above her rating, which is above what sans scales way below. I'll go over more details regarding this later in the reply.
To reiterate, even if she doesn't resist the KR status, she resist the other aspect of sans' dura neg (ie, sans' ability to deal 1 damage regardless of the opponents HP making it stack up overtime), which is what makes it so effective in the first place. So, really, in this match, KR is the only way sans can deal lasting damage against Lyn, making KR more or less a glorified poison status, relegating him to draining Lyn's health overtime, rather than it being a nigh-insta win con. Effectively, this is not much different than being hit by a poisoned weapon,
which is by no means something Lyn hasn't dealt with before, and not something she can't heal.
(Yes, I'm aware that KR =/= poison, no need to point it out, I'm just saying that effectively, they both have the same effect against Lyn here)
¯\
(ツ)/¯ maybe its because the latter would imply that Lyn can telepathically communicate with others, but other than that idk
More or less a form of mind-reading.
- sans has never used his TK defensively.
- Even if he did, how would he even be able to TK a target moving too fast for him to see? There is nothing (that I can remember) that suggests he can do so.
- Lyn also creates 4 other copies of herself, so there's a 4/5 chance that sans would target the wrong Lyn regardless.
That's also not to mention the fact that Lyn being able to survive without her soul, but not actually resisting soul manip actually works in her favor here, because if her soul is destroyed prior, it means sans can't even TK her. And unlike his durability negation, his TK does seem dependent on the soul.
Where exactly? The topic about the AP gap was brought up a few times, but it was never agreed one way or the other. Moreover, you yourself said that the AP gap was significant enough that sans' attacks wouldn't do much:
But anyways, given that:
- Sans scales WAY below his rating. Like, the dude has 1 ATK compared to Mettaton's 47 ATK (ie, the dude that actually performed the feat)
- Lyn scales above a rating greater than what sans scales WAY below.
- Lyn can crit for triple damage.
While I won't go as far as to say that she is GUARANTEED to one-shot sans (even though imo she probably does, given sans piss poor ability to sustain damage, but meh), it really doesn't matter that much, given that she isn't only going to make one attack within the same attack interval. So if the first hit doesn't take him down, the second attack onwards sure would.