Guardian Ghost.Yoh wants the spirit of Amidamaru to be his guardian spirit, but he refuses because he is waiting for someone and can't leave the cemetery. Yoh tries to find out who the samurai is waiting for and decides to visit a local museum where Amidamaru's sword, Harusame, is kept. They learn from the museum's janitor that legend has it that the sword cries every night and a haunting voice can be heard. Yoh and Manta investigate and find out that Mosuke, the sword's forger and Amidamaru's close friend, is the one who cries. He explains that the two boys grew up 600 years ago in a war-torn Japan. When they became adults, they were hired by a Daimyō. However, he eventually ordered Amidamaru to kill Mosuke so that no other Harusame could be forged. Instead, he told Mosuke to flee. Mosuke asked for Harusame and promised to return it as the best katana ever in the next night. However, someone overheard the conversation and the Daimyō sent several soldiers to kill Amidamaru, who slayed them all and became a legend for it. However, without his Harusame, he eventually died. Feeling guilty for Amidamaru's death and embarrassed for Harusame's ruined state, Mosuke now spends his death crying over the sword. With the help of Yoh, who embodies him, Mosuke is finally able to restore Harusame and leaves to the world of the dead. Yoh delivers the sword to Amidamaru, who also decides to leave the living world. However, Ryu returns to the cemetery seeking revenge. Amidamaru aborts his trip and helps Yoh defeat the vandal again. Afterwards, Amidamaru decides to stay and become Yoh's ally. Harusame is returned to the museum and its restoring is regarded as a miracle.