In the most recent episode, Reiji has finally tracked down his brother, Shinji, during a chaotic battle against Mononoke. The encounter reveals that Shinji is guarding a Mononoke while using the same weapon that killed their kin.

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The Sasuke-style vendetta driving Reiji

The character dynamics in the latest episode suggest a narrative heavily influenced by classic shonen tropes. Reiji, a key male member of the team, is currently navigating a path of vengeance that closely mirrors the journey of Sasuke Uchiha. According to the report, Reiji’s entire motivation stems from a traumatic past where his brother, Shinji, murdered their family after gaining a new power.

This history of violence is not just a backstory but the primary engine for Reiji's current actions. Having been spared by Shinji during the massacre, Reiji has spent his life on a secret mission to find his sibling and settle the score. The report notes that this confrontation is the culmination of that long-held grudge,bringing the two brothers face-to-face in a high-stakes environment.

The Mononoke blade and the fourth protector

The confrontation took place within a dangerous zone where three Mononoke had successfully trapped humans to harvest their vital energy. As the team attempted to manage the chaos, they discovered that a fourth Mononoke was present, acting as a guardian for the entity that cast the entrapment spell. This unexpected addition to the battlefield shifted the focus of the fight entirely.

Upon reaching the location of the spell-caster,Reiji was met with the shocking sight of Shinji acting as the protector. The source reports that Shinji was wielding the specific Mononoke blade that was used to kill their family members years ago. This revelation adds a layer of immediate physical threat to the emotional weight of the brotherly reunion.

A 13-episode race to reveal Shinji's motive

Because the series is structured as a short-form narrative, there is little room for filler or prolonged tension. With a total runtime expected to be no more than 13 episodes, the writers are forced to move quickly toward a resolution. The upcoming episode is expected to be a turning point, providing the "epic confrontation" fans have been anticipating.

The brevity of the series means that the answers to the central mystery—why Shinji killed his family—must be delivered almost immediately. This tight pacing places immense pressure on the next installment to justify the buildup and provide clarity on the complex relationship between the two brothers.

The Itachi theory: Sacrifice or slaughter?

While the immediate threat is the fight itself,the underlying reason for Shinji's actions remains a subject of intense speculation. One prominent theory suggests that Shinji’s motivations might mirror those of the character Itachi. It is possible that Shinji viewed the Mononoke swords as too dangerous for anyone else to possess and chose to eradicate his family to prevent the weapons from falling into the wrong hands.

This theory posits that Shinji may be intentionally positioning Reiji to become a powerful warrior through the motive of revenge.. If this is the case, the massacre might have been a calculated, albeit brutal, method to ensure Reiji could eventually deliver a final blow to the Mononoke's power. However, until the next episode airs, it remains unverified whether Shinji is a true villain or a tragic protector.