Ishtar

Protagonist of Route B, a young woman followed by companions.
The charismatic leader of hacker team "Criminal". She sports a cheerful personality, but is also an able people person, rightfully deserving her position and receiving her comrades' unconditional trust.

She dies at the end of Route B 1.0 at the hands of HE who, by accident, traps her in a hallway filled with toxic gas which kills her. Her consciousness escapes her body and manifests itself into sentient data ('Shadow Null'), alongside the rest of the Criminal gang.