You don't get much in the way of details or backstories on the Cie'th stone missions, but the ones that touched me the most was the siblings who wanted to protect the chocobos on Gran Pulse. Number Fourteen wanted to become a L'Cie specifically to protect the flock and after she disappeared her brother (?) Number Sixteen took her focus as his own.
I was curious what these two had been like in life so I made some line art. I'll color them in later. I'm calling them based on the mission numbers since they don't have given names. I tried to emulate the Pulsian design aesthetic.
EDIT: Added the colored versions.