Xenosaga The Animation

Humanity's expansion through space is threatened by the Gnosis, beings that conventional defenses struggle to stop. Researcher Shion Uzuki is developing KOS-MOS, an android designed to confront them, when an attack on her ship reveals capabilities she did not expect and forces her beyond the security of her laboratory.

Among the survivors and travelers she encounters are the artificial girl MOMO and her protector Ziggy, each connected to interests far larger than their immediate escape. As rival powers pursue hidden data and mysterious technology, Shion must question KOS-MOS's true purpose and the unresolved past that shadows her own life.