The old story spoke of a blood red bird that lived in a dark tangle of wires inside a robots chest. The robot was a medic in the military. It retrieved the bodies from the front line.
Once the robot brought back all the wounded and the dead it would be repaired if it’d been shot up or damaged. The bird would also be watered and fed.
In the evening the bird would sing the robot to sleep, and sometimes sing to it all night long, however long it took.
And when the robot awoke in the morning it would be refreshed.