C.S. Lewis' Chronicles of Narnia are a great children's series which present an allegory the New Testament and Biblical history. That said, Lewis sometimes put in things that don't necessarily reflect traditional Christian beliefs, such as his inclusion of the character Emeth who through his good deeds alone (not his belief in Christ/Aslan) stirs deep controversy.
The Last Battle is a stirring story that is similar and style and feel to the Book of Revelation. There is a character, Puzzle the Donkey, who although good follows what he knows to be incorrect and evil. He is ultimately forgiven by Christ/Aslan, but not before being told something that "that made his ears go down, and some more words that made his ears go up".
Is there a corresponding group or entity in Biblical history that has a similar fate as Puzzle?