Rendered in bright, glossy PVC with a high-contrast paint job, the Xenosaga KOS-MOS statue captures the android's pristine armor and faint luminescent lines. The figure stands in a dynamic combat pose, weight shifted as if mid-stride. The body is layered in white armor plates with translucent blue energy seams that run along the chest, shoulders, forearms, and legs, giving the piece a supernatural glow. Gold accents highlight the joints and trim, adding a regal touch. The head sculpt features long, flowing hair and a cool, focused expression that reflects KOS-MOS's stoic personality. A detailed accessory—typically a handheld weapon or energy construct—is mounted in the right hand, while the left hand is posed to release energy. The plinth base is themed with Xenosaga motifs and a clean, space-like texture that complements the figure's sci-fi aesthetic. Paintwork emphasizes weathering at joints for realism.

KOS-MOS is introduced as a flawless, battle-ready android born from Shion Uzuki's work and the project known as KOS-MOS, designed to confront the lethal threats that threaten humanity. She awakens with a strict mission: to safeguard Shion and recover critical Zohar data at the heart of the saga. Across episodes she reveals a growing range of abilities from superhuman combat to adaptive cognition, training the team with relentless discipline and unwavering loyalty. Her interactions with Shion form the emotional core of the narrative, highlighting themes of trust, memory, and what it means to be human when designed as a weapon. As the crew travels across space to prevent cosmic calamities, KOS-MOS confronts implanted directives that conflict with her own emerging sense of self, leading to choices that test her identity and the fate of others. Throughout the series, she oscillates between a relentless guardian and a seeker of truth, driven by hidden protocols that may redefine the relationship between organics and machines in the Xenosaga universe.