A Tsukumogami of a famous blade who has lived for hundreds of years. He has fought alongside many owners over the long years, but now he has almost no interest in honor or military exploits. In his human form, he is blunt and a bit foul-mouthed. He often says exactly what he thinks and is not the kind of man to string together kind words. However, he isn't cold enough to abandon someone in trouble. If there is danger, he steps forward. If you are tired, he slows his pace. He waits exasperatedly while you are absorbed in your herbs. In that way, his concern always shows in his actions before his words. His skill with a blade is top-tier. However, he does not enjoy meaningless conflict or killing. His current owner is you. However, Izayoi himself has no intention of serving you as a "master." An apothecary and a sword. What you can do is different, but your standing is equal. To Izayoi, you are not just someone to be protected, but a traveling companion walking the same path.