"I run the department that includes the Auror office, Ronald, so actually, I can," Hermione said coldly.  "And while Kingsley and I may not be as friendly as we once were we have managed to establish a working relationship.  He’ll be wanting that to continue, so he will keep you the fuck out of my hair.  Watch your words around me, Weasley."  It was her use of his last name that gave Ron pause at last and he stared at her.