Warning! Spoilers ahead for Doron Dororon chapter 7!
Doron Dororon has been failing to capture the attention of readers ever since the big twist in its debut chapter, but the Shonen Jump newbie just introduced a new dynamic between the hero Dora and his «katana» that actually transcends the unique relationship between Naruto's Kisame and his sentient sword Samehada.
Dora's katana in Doron Dororon is actually a mononoke named Kusanagi that can take numerous forms. But only as a katana can Dora wield Kusanagi's power, which enables him to become one of his world's heroes known as Samurai. Their relationship is predicated on their shared desire to make the world a kinder place and Kusanagi's willingness to destroy his own kind in the pursuit thereof. But in chapter 7, Kusanagi actually refuses to transform into a katana when he learns that Dora is only obsessed with killing a powerful mononoke because it killed his mother. Kusanagi even holds Dora back when the human tries to jump back into the fray without him. It's an especially poignant moment especially when Kusanagi asks if Dora is only using him as a tool for his revenge before reminding his partner that they must fight together to protect people, not to seek vengeance.
Related: Boruto Just Proved it Should Have Focused on Naruto's Other Son
In Naruto, the shinobi Kisame Hoshigaki, who eventually became renowned for his membership in the villainous group Akatsuki, wielded a sentient sword known as Samehada. The blade's bond with Kisame was especially touching in part because Samehada was illustrious for being very particular about who could wield him, and he stayed with Kisame for so long regardless. Even though Samehada, who craved chakra more than anything else
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