There are so many stories about a robot becoming more human, but this one really stands out from the group! I like how the robot, in absence of her original objectives, creates new objectives for creating the necklace. She doesn't necessarily feel, but if she can understand a human reaction and emulate it, from the outside it is indistinguishable. Instead of blasting bogies to shrapnel, she is collecting delicate shells and stringing them together as a memorial for her fallen comrades. And, really, what else is there to do--she knows she has limited time remaining, but she chooses NOT to just sit and wait for the end, instead taking initiative and trying to make a difference, to immortalize her fellow soldiers through story.
I didn't get anywhere near crying, but the image of her making her memorials was really amazing, and I really felt bad when she finally stopped functioning.