Kubo has to be the worst character in this whole manga, pretty much the author's pet, the amount of plot armor he get as a side character is insane, the whole escape is played as something that would be difficult then next chapter he just trivialize all sort of tension there was by single handedly killing 27 men and judging from the raw it get worse. The manga had already overstayed its welcome with this whole arc but this just take it another step further.