Gharen is unlikely do die peacefully. and I see this going down in one of two ways.
Good ending: Gharen attains his dream of mastering all known forms of combat becoming an Ala Mhigan weapons master, He dies soon after in battle against an overwhelming enemy in defense of his loved ones. He dies happy, knowing that his family live on and his life had meaning.
Bad ending: The experiments conducted on him by Raelisanne Banurein have left an unseen lasting effect upon Gharen and he finally loses his internal battle of wills with his id, either having evolved into a completely separate dominant personality or remaining a base vicious animal, the wolf becomes a threat to all. Roen, Hornet and Qaeli are forced to track him down and end Gharen's life.
Good ending: Gharen attains his dream of mastering all known forms of combat becoming an Ala Mhigan weapons master, He dies soon after in battle against an overwhelming enemy in defense of his loved ones. He dies happy, knowing that his family live on and his life had meaning.
Bad ending: The experiments conducted on him by Raelisanne Banurein have left an unseen lasting effect upon Gharen and he finally loses his internal battle of wills with his id, either having evolved into a completely separate dominant personality or remaining a base vicious animal, the wolf becomes a threat to all. Roen, Hornet and Qaeli are forced to track him down and end Gharen's life.
