Motoko Kusanagi, a cybernetically enhanced being retaining only her brain and spinal cord from her organic origins, endured a traumatic childhood defined by a plane crash that left her comatose. Forced into full-body cyberization without consent, the procedure erased most pre-accident memories, sparing fragmented glimpses of a paralyzed boy folding paper cranes for her recovery—later identified as Hideo Kuze, a shadow from her unresolved past.

Adopting her alias, she ascended through the Japanese Ground Self-Defense Force to major before joining Public Security Section 9. Her strategic leadership blends tactical rigor with a deliberate inclusion of minimally augmented operatives like Togusa, fostering diverse perspectives. A bond with Batou evolved over time, rooted in mutual trust and unspoken emotional undercurrents.

After the Simultaneous Global Default economic collapse, she led Section 9 as mercenaries under "GHOST," navigating global "Sustainable War" conflicts to stabilize economies. Amidst this chaos, she clashed with "Post Humans"—cyberbrain-enhanced entities—and unraveled conspiracies involving former allies, reassembling scattered Section 9 members to counter network-destabilizing threats.

Her existential inquiries into identity and humanity drove interactions with artificial intelligences and cybernetic beings. A pivotal fusion with the AI Puppet Master expanded her hacking prowess while distancing her from physical humanity, enabling remote consciousness interventions via satellite-linked proxies during crises.

Equipped with military-grade prosthetics granting superhuman strength, therm-optic camouflage, and cyberbrain infiltration skills, she hones tactical ingenuity—orchestrating drone swarms and breaching secure systems. Despite her mechanized form, she exhibits curiosity toward human emotions and social norms, occasionally experimenting with unconventional interactions, yet prioritizes duty above all.