Shane could be an individual with a passion for the macabre. In the context of 'Shane telling scary stories', he or she is the storyteller. Maybe Shane grew up hearing scary stories himself or herself and decided to carry on the tradition. He or she might have a collection of age - old tales, or perhaps create their own original scary stories to share with others.
JJ Harper is likely a significant character in this particular story. Given that the title includes 'the JJ Harper story' within the context of cowboys and Indians, he could be a person with a unique backstory. He might be a native American who has interactions with cowboys, or perhaps a cowboy who has a deep connection with the Indian community. His character could be developed through various events in the story, such as facing challenges, forging alliances, or trying to overcome cultural barriers between the two groups.
One interesting Shane Acker fanfiction could be about exploring the backstories of the characters in his works in more depth. For example, delving into the childhood of a character and how it shaped their actions in the story.