Zeref seems to be the most major antagonist of this story, and is likely to be the final villain, but the exact extent of his evilness seems to be uncertain at best. At times, he seems to be sympathetic and regretful of all the warfare and conflict that exists in the world, but, at other times, he is completely evil and seeks to annihilate everything, which is an interesting contrast of personalities. What does everyone else say about Zeref? Is he completely evil, or only a tragic and tormented soul? What may account for his differences of personality?