I really like how did not become a dumbass thinking "Oh shit I'm fucking strong now I'll get a confidence boost out of fucking nowhere." He still has the same personality. He likes to help people and it's not something like helping everyone even if it's someone who bullied him or trying to get...
"b-bUt nAGuMO-kUn WhY dID yOu kiLL HiM eVeN iF HE triED tO KilL mE We cOuLD SaVe hiM WitH THe pOwER Of FRieNdShiP!"
Smh sensei shut the fuck up for a minute
"Oh shit this guy is stronger than normal I should put my sword aside and fight my bare hands with a confidence boost coming out of nowhere then find out I'm not that strong and equip sword again."
wtf
Edit: I remembered why I dropped this manga