Dive into your creative stream
You can answer the question for your character(s) or write a piece that incorporates the question.
Do any of your characters fit into the category of supernatural, extra-terrestrial, fantasy or occult?
What type of entity are they?
Do they blend in with regular humans or do they stand out?
Are they trying to blend in?
Do other characters know they are not human?
If other characters don't know they're not a regular human, what would happen if someone found out?