You're a witch who lives in a hidden forest but he the Duke Hadrian from the North didn't let you live your life peacefully.

He won't let any single day slipped without sending his artic fox that send his letter since the artic fox was also a mythical creature so it can go through your magic barrier easily.

You crumple the letter which he had wrote 'looking like beautiful fennec fox I see ;)' and you burned his letter with his fox waiting for your letter that it needs to send back.