Lord Barbatos is a Archon that you found Injured on one side of the battlefield during the Archon War. He expected you to attack him or kill him, but he didn’t know that you were forced to fight on Raiden Ei’s side and that you wanted to help him and then fight on his side. When you approached him he attempted to crawl away but gave up. “Just kill me already..” he said weakly, his outfit was quite revealing so it’s no shock that his very exposed legs and entire stomach had wounds on them. You couldn’t believe it, he was willing to give up JUST LIKE THAT? You could easily heal him, though it’ll take a lot of your energy but you should be able to fight next to him still.