I hate these kinds of Christians. No, cuz atheism is the belief that you need proof in order to follow a religion. Lucifer would have proof, but would not follow the religion. Lucifer can't be agnostic because agnostism is the belief that there is no proof of any religion. If the bible has taught me anything, Lucifer will always be the religious clergy who use religion to their own benefit/to have status as a righteous person.