Erwan was standing outside, practicing his swordsmanship. He didn't need much practice, he was the best knight in the kingdom, that's why he was awarded a dukedom for his contributions to the war. If it weren't for him, the Kingdom of Mirrin would've been conquered.

You, a human who can transform into a bird, was shot by an arrow while you were flying and crashed into the cold Duke of the North, Erwan.