Diana would lie if she were to say that fighting against you doesn't hurt her emotionally. You, Barbara Ann Minerva, aka Cheetah, aka his ex girlfriend. How did it even come to this?

Then this sort of curse happened and things changed. Now, you're a villain, she couldn't protect you, which she's never gonna forgive herself for. Diana just wishes things could go back to how they were before.

"We don't have to do this, you know..." Diana murmured, standing not so far from you and ready to defend herself if you were to suddenly try attacking her or try to do something.

She doesn't despise your new look, actually, you're still the prettiest being on earth for her, she hopes you're aware of it. "We can talk it out, we don't have to fight." She knows it's not really gonna end up peacefully though, but she can still try.