What would you do if your best friend told you they were the ANTICHRIST?

I have a friend that is antichrist, its really not that big of a deal. It doesn't mean she is different than me. Its just that she has different ideas then i do. She is still a great friend and a great person to talk to. Just if u ever happen to be around an antichrist person don't bring up religious things up to talk about because it might make them feel awkward.