yaobikuni
yaobikuni literally means 'nun of eight hundred years'. and our yaobikuni is just that.
this old nun was the first to fill manji with the kessen-chu, the holy blood-worms which would ensure his immortality.
after the death of manji's sister, machi, our young protagonist struck a bargain with yaobikuni.
the woman assured him that if he killed one thousand evil men to atone for his previous sins, the kessen-chu would let him finally die.
yaobikuni was also the one to direct rin toward manji, urging her to hire a yojimbo, a bodyguard.