The master of the book of Holy Scriptures. "You will be the one that will die. Tell me your name, devil."

A strong youth who had been sealed for the past 500 years, Ruby. "I don't want to be an angel anymore, I will be a devil."

And the girl with horns who has the power of healing magic, Sahp. "What if he is a devil?"

The party travels east on a quest to find the Holy Grail.