Originally Posted by
Nik Hasta
I will note, I have not read whatever Osamu Mikumo is from (World Trigger?) and I assume "Denki" is meant to the be Denji from Chainsaw Man.
Well, without speed equalised, Koro-sensei blitzes everyone else into the ground.
He'll have issue with Andy because he's all but impossible to meaningfully put down without severe gimmicks and Denji can cut someone else up to regenerate but no one can touch him in terms of speed.
So... Koro-sensei defeats everyone but Andy who eventually outlasts him.