The man never expected Grey would move with such explosive speed, nor did he expect Grey to come towards him.
Anyone in Grey's position would be looking to escape from his clutches, yet Grey was not only trying to escape, but he was actively coming his way. The annoying thing is that due to his speed, there's no way he could move away from the incoming Grey.
'I'll prepare an attack before he can.'
This was the only thought in his head. Grey didn't prepare and attack beforehand, so he had nothing to fear. As long as Grey paused to create an attack, he would be able to attack before Grey's able to do that.
Sovereign's can attack almost instantaneously, while Venerables are a little slower compared to them. Grey might be a Pseudo-sovereign, but he can't be as fast as the man.