Episode 9 begins with a surprising twist, as Emma offers unanticipated commendation for the villainous AUZA. Despite their nefarious deeds and their lethal ninja squad, AUZA has made remarkable strides in the realm of energy, Emma remarks. After exchanging pleasantries, Emma unveils her strategy. She and Higan intend to infiltrate operational power plants to sabotage them, all while procuring portable energy supplies to sustain their Kamui armor's power.
Moreover, Emma grants Mike and Jason unrestricted access to her computers, just in case they need to infiltrate AUZA's systems once again.
Elsewhere, the CEO loses his composure with Yamazi, lambasting his ninja team for their incompetence and failure to eliminate Higan. He issues a stark warning to Yamazi: if these "mindless ninjas" fail again, they will be compelled to perform Seppuku, a ritual suicide.
Yamazi retaliates, calling the CEO a fool who can't distinguish between a ninja and a samurai.
Later, the CEO attempts to contact his assassin, Big D, but Big D is in the midst of a haircut and misses the call. In an unusual move, the CEO inspects Big D's equipment, a gesture unprecedented in their interactions.
Elsewhere, Emma offers Higan a tutorial on mastering his Gosuko Gear, also known as the Kamui armor, elucidating that with its correct usage, he would become invincible, yet a solitary misstep could transform it into his own tomb. Higan urges Emma to step aside and let him handle it alone, but she firmly declines, insisting that she is an integral part of this battle.
Later, Emma and Jason dive into the task of hacking into AUZA's satellites. They successfully breach the initial firewall, but their triumph is fleeting as Big D arrives on the scene, firing his weapons indiscriminately. Higan leaps into the fray, giving Emma and Jason a chance to infiltrate the database. Mike joins Emma in the melee, confronting their human adversaries.
Big D puts up a formidable fight, but Higan eventually brings him down by plunging his sword deep into Big D's chest. Big D accepts his impending doom, bracing himself for death. However, his suit suddenly begins to explode as the CEO initiates the self-destruct sequence. Big D shields Higan from the blast, sacrificing himself to save him, but Emma is gravely wounded in the detonation.
In her dying moments, Emma's life flashes before her eyes, from her cherished friendship with Mari to late-night karaoke sessions with Mike. Despite the best efforts of everyone around her, Emma passes away tragically. The episode concludes with Higan, Jason, and Mike giving their fallen comrade a poignant funeral, paying tribute to her memory and the immense sacrifices she made.
