Who is wonder womans arch enemy?

There were various negative characters. Foo Young- well too ridiculous to describe, but a real Egg Head Robot of Red Chinese origin, no longer politically c correct, also various Nazi baddies, Dr. Cyber ( a woman) and numerous mytho-and science-fictional problem characters such as The Empress of the Silver Serpent or Goddess of the Silver snake- it was snake, not serpent ( serpent sounds more mythological, like Sea Serpent) - she had bronze skin, was called Astarte, and threatened Diana/Wonder Woman in outer space.