Kei Himuro emerges as a secondary antagonist, initially depicted as the former assistant to the creator of the DC Mini, a revolutionary device permitting dream infiltration. His collaboration in developing the technology curdles into resentment toward the inventor, fueled by a belief that his own contributions were overshadowed, sparking jealousy and eventual betrayal. This personal conflict drives him to steal three DC Mini prototypes—an act later exposed as a maneuver in a larger conspiracy orchestrated by senior figures within their organization. Following the theft, his physical body is found lifeless, his consciousness subsumed or manipulated by external forces seeking to weaponize the DC Mini’s power to erode the division between dreams and waking life. Investigators uncover contextual evidence in his apartment, including a magazine tied to a subplot involving a manipulative sexual liaison, implying vulnerabilities leveraged to infiltrate the project. Within the dreamscape, his fractured subconscious materializes as a disorienting parade of invasive imagery that hijacks others’ dreams, mirroring the destabilization wrought by the stolen technology. This chaotic phenomenon accelerates the collapse of reality as dream logic bleeds into the physical world. His corrupted dreamspace later becomes a trap for other characters, sparking pivotal confrontations that propel the narrative toward its climax. Kei’s background remains narrowly defined, anchored to his professional ties to the inventor and his subsequent exploitation as a pawn. His existence prior to these events and his ultimate fate post-conflict remain unaddressed, his narrative purpose centering on igniting the core conflict through his actions while embodying themes of envy, external manipulation, and the ethical perils of unrestrained technological innovation.