Luffy didnt fucking have ryou the first time thats why
So did the i scrabbards and yet all of a sudden they had it....luffy is the only person to train for it on screen....if you read what i typed, i said if oda wants to make killer or law have advanced haki he would with no explanation because it's needed fir the plot
I remember the time people were saying the scrabbards can't hurt kaido and look they all did...these are the same people saying that law, kid and killer can't hurt kaido and we know they will cause plot