Throne talk

Then | shook my head. Concentrate.
The throne rumbled. A wave of gale-force anger slammed into my mind:
WHO DARES -
The voice stopped abruptly. The anger retreated, which was a good thing, because just those two words had almost blasted my mind to shreds.
Percy. My father’s voice was still angry but more controlled. What - exactly - are you doing on my throne?

TLO ch.17