"And yet look at how bravely I go," Percy muttered in answer, eyes fixed ahead as he walked. When he was shut up back in his office he would laugh about this, he just knew it.
he was actually a bit surprised that Fred was following, that he hadn't simply let him go. Or that he hadn't followed him simply to put his fist in Percy's face. Of course that was still a possibility.
So how did he get one of the stubborner members of his stubborn family away from him so he could have a few minutes of peace? Ignoring him would only make Fred mad, but he couldn't talk with him. What in the world would they have to talk about?
Maybe if he started in on some lecture Fred would scarper. Nothing could drive a Weasley away faster than a lecture.