Narro was a neophyte in the Scythes of the Emperor, after the fall of Sotha. He was a member of the 21st Salvation Team under Sergeant Tiresias.
He came from the hive world of Radnar, from a privileged background.
He had a good grasp of practical tasks, and had received additional training from Forge Master Sebastion to become a Techmarine.
He died aboard a Tyranid Hive Ship, losing an arm to bio-acid before being killed by a Ravener.