At first, the vampire he attacked was taken completely off-guard and received punch after punch to his face. Azier even used his grimoire as a weapon as he brought it over his head and back down onto the stranger's nose until it started to bleed.
Then, thing changed rather quickly as his foe began to dodge each hit now, and swiveled his head back and forth to avoid Azier's blows. It was only a moment until the man was able to escape from underneath the prince, and he gave off the appearance that he teleported when he wound up behind the prince and gave him a blow to his back.