Hikari is the diligent computer specialist aboard the Muze, leveraging her technical expertise to decrypt data from derelict vessels like the Zogne. Her discoveries expose the lethal drug Metrogria—a substance crippling immune systems and accelerating the crew’s downfall. Accompanied by Einstein, her perceptive ferret capable of sensing danger, she integrates the animal’s instincts into her investigative routines.

Her familial tie to Yuri, a sister and crewmate, anchors her motivations. As Hikari strategizes against an encroaching alien threat, protecting Yuri becomes inseparable from her mission. She directly engages the entity, deploying weaponry and Metrogria to exploit its vulnerabilities. Despite her calculated efforts, Yuri succumbs to possession, forcing Hikari into a harrowing confrontation where survival demands irreversible choices.

Visually distinct with striking purple hair and mint-green eyes, Hikari balances pragmatism with relentless initiative, often spearheading threat responses. Colleagues occasionally note her bond with Einstein, offering fleeting levity amid escalating crises.

The narrative closes with lingering ambiguity: Yuri’s possession may endure despite Hikari’s interventions. A post-credits sequence heightens tension as Yuri exhibits eerie mannerisms during a reunion, while an alternate ending implies Hikari’s psychological scars. Together, these threads frame her as a survivor grappling with external perils and the weight of fractured bonds.