Vergil could tell someone was watching, being half demon and a fighter for as many centuries as he had walked the earth he knew when someone was in a close range. Namely in a place such as this. At first he had thought it was his mind playing tricks but after a few minutes he turned looking to the brush. His blue eyes narrowing some.

"Come out, come out, where ever you are." He expected one of the ones aiming to kill to be stalking. So his hand stayed on the hilt ready to attack if needed.