She would probably terrify Double, which is impossible.
To add to what cd young said and put this woman's threat level into perspective:
She was going to kill everyone on Earth, Evangelion-Instrumentality-style... just so she could experience the greatest orgasm ever. I sh*t you not. This was her plan. She basically kills whomever she wants, whenever she wants, as long as she can derive pleasure from it.
And in two separate timelines she went from a relatively ordinary human with some magic talent to a God-like monster capable of wiping out humanity.