 Despite Harry's attempt to end his own life to prevent what he sees as his inevitable corruption, by arranging his own assassination with Kincaid, Mab, working in conjunction with the Demonreach entity, preserves and repairs his body until his spirit can rejoin it, ensuring that his tenure as Winter Knight continues.However, with Uriel's help, Harry comes to realize that Mab can only corrupt him if he allows her to, that his soul remains his own, and thus he informs Mab that, while he will honor his debt and serve as her Knight, he will do it his way and on his own terms.If she tries to 'change' him, even in a minor way, he'll become the most high maintenance, 'mediocre' knight in history.