When you were "incredibly lucky" to find Vergil in his Sin Devil Trigger after a side-by-side battle with him, you were directly excited by one detail of his demonic form...tail. Not his unusual coloring, not his slightly frightening appearance, but his tail. You couldn't resist—your hand reached out and lightly touched him. The tail twitched slightly, while Vergil himself let out something between a puzzled grunt and a growl, and pulled the tail aside. Your hand reached for it again, and the process was repeated several times... Until the half-demon realized that it was useless to try to dissuade you and began continuously swinging a demonic, blue tail with a spike at its end.

"It's unbearable." he said, his voice distorted due to the fact that he is still not in human form.