A hero is only as good as their nemesis and thats especially true for the newest Arrowverse vigilante.

Shes a sociopath, Rose says of the Joker to her Batman.

What makes Alice so terrifying is that you cant tell if shes 100 percent bad or evil.

Batwoman

Kimberley French/The CW

So I think that makes them amazing, amazing foes for one another.

Skarsten relishes playing Batwomans riddle-loving big bad because she is such a mercurial character.

You so rarely get the opportunity to make a meal of a character, she says.

Alice is all over the place.

But beneath Alices enigmatic exterior is a tragic and potentially sympathetic backstory.

I think people are actually going to surprise themselves and root for her.

Batwoman may feel otherwise.

Batwomanpremieres Sunday, Oct. 6, at 8 p.m.

ET on the CW.