He is ancient and powerful. A natural leader, he’s always been able to calculate risks better than most, which isn’t always good It’s not always a benefit to know just how little chance your good guys have of succeeding.
It should be noted that he’s quite mad. All the Broken are. He hides it with spooky skill, however.
He makes his first appearance in Half-Shell Prophecies, and though Notte considers him a friend, Notte also considers him quite crazy. And as everyone knows, Guardians who are crazy tend to think scorched-earth solutions fix the problem better than anything else….