I thought he was rather charming, myself -- a good little despot in training. Plus, he's like 14 and he's already getting him some. If I were doing that at his age, I'd be a bastard too.
I just took my revenge on him by cramming his throne and footstool in my inventory and throwing them outside the castle, so that I could decorate my house with 'em later. You may be unkillable, but I bet your legs are tired, Janus!