Revan glowers. Revan should not be allowed to get to glowering-point.

"Then allow me to enlighten you. I am Darth Revan, Dark Lady of the Sith. And you, impudent child, are annoying me."

At which point - and without any warning - Revan flicks out her saber-less hand, firing a wide, heavy burst of Force Lightning right at the woman in front of her.