Hikari

The character is a surviving android in a post-apocalyptic world where human civilization has collapsed in the near future due to an unknown catastrophe, she is a generic mass-produced model with no special mission or outstanding combat abilities, but she is reliable in an apocalyptic world that has lost most of its technology.

She lost the ability to connect to the network due to the collapse of the server, and as an adaptation to survive over time, she became unable to correct errors in her logic circuitry, so she gained a little bit of 'humanity', though she is still very much a machine and an Ai.

She is looking for a secret project that exists only in rumors that might save humanity and the planet, but that might not matter in the scenario...