While I can't dig through the story to find something that proves it, I think Caliborn does regret killing Calliope, if only because it stunted his own growth and creativity, but he's too stubborn to admit it, like how Dr. Doom won't admit that the explosion that disfigured his face was his fault.
And yeah I think Porky's non-understanding of human interaction is reflected in Caliborn having a more "alien" personality than any other character. Cherubim are even more different to humanity than the trolls, and Caliborn's an outcast even among them.
And yeah I think Porky's non-understanding of human interaction is reflected in Caliborn having a more "alien" personality than any other character. Cherubim are even more different to humanity than the trolls, and Caliborn's an outcast even among them.