Here's why:
* "Fallen" is not a well-known or widely circulated work. It is possible that the story is part of a larger collection or unpublished. Without context, it's hard to identify any specific antagonists.
* The nature of "fallen" suggests a metaphorical struggle. The title itself implies a fall from grace or a state of being. The antagonist could be internal struggles, temptations, societal forces, or even abstract concepts like fate or destiny.
To help you identify the antagonist, I need more information:
* Can you provide a summary of the story or the protagonist's situation?
* Is there any specific conflict or challenge the protagonist faces?
* Are there any characters or forces that oppose the protagonist's goals or beliefs?
Once I have a better understanding of the story's plot and themes, I can provide a more insightful response.