itachi? i wud say hidan. the mans gary busy batsh*t crazy. itachi seemed calm. he wudnt hurt unless sum1 fights him but yea the other 2 first than hidan
i dnt knw abt yall but itachi!!!! hes so quite and u rarely c him outside of his sharingan, everyone knws how powerful he is but he doesnt show boat it at all.
Pain definatly. Well atleast when he attacked the villiage. I mean, the dude had imense strength, there were more than one of him, he had creepy eyes,and a heartless attitude. If not him then probably Kakuzu
Kakuzu was easily the stand out guy with the scariest personality however I'd stand and fight him while if pain turned up, you knew you was in the shit so he was by far thee most intimidating