Jaun Elia.
He was a writer and a poet.
Pablo brought him with him to write about the war in brutal honesty. Pablo told him to write only the truth. No need to glorify anyone or anything. Just the truth. And yet, he ended up making Pablo the hero in the story he wrote on the battlefield.
He was hidden under ten or twenty corpses and was writing. He also had a small screen on his hand which showed him the war from all angles since he couldn't write about the war well if he stayed in only one stop.
He wasn't a good fighter and didn't have an Ego that could be used for fighting. So the screen really helped him as he wouldn't have been able to roam around the Crucible and write about the complete happenings of the war.
Pablo had burned all the tents of the soldiers but he believed he should have kept one for Jaun. He had forgotten about the man as he had become the Criminal Pablo Castillo for the war.