Do you want to compare Oya with Mephisto? Discover the powers, weakness & weapons of Oya and Mephisto from Oya Biography and Mephisto Biography. Find out all about Oya and Mephisto.# Check out how is Oya unique and distinct from Mephisto. Discover their love interest, sidekicks, family tree and the movies and games list in which Oya and Mephisto have appeared. Find out everything about them here!