One of the scariest stories might be about the haunted house in his tales. The description of the creaky floors and strange noises makes it really spooky.
In a more light - hearted scenario, Emily could be a mischievous pet, like a cat or a dog that has run away, and the 'catching Emily' part is all about the family trying to bring their beloved pet back home.
One common theme is her struggle for acceptance. Since she has a complex past, she often has to prove herself to the other Avengers. Another theme is her relationship with her powers. In many fanfics, she is learning to control and utilize her abilities better within the Avengers setting.
Well, there's a fanfic called 'Kinney's Magical Adventure'. In this story, Laura Kinney discovers she has some latent magical abilities and ends up getting involved with Harry Potter and his friends. It's full of action and some really cool magical battles. Also, 'Harry and Laura: The Crossover' is quite popular. It focuses on a quest that Harry and Laura embark on together, facing many challenges along the way.
I'm sorry, I don't know much about James Patrick Kinney specifically. There could be many people with this name. Maybe he is an ordinary person living a normal life, or he could be someone known in a particular community, but without more context, it's hard to tell his life story.
In the 'Emily Rose Story', Emily Rose is a girl who has to endure the horror of being possessed. She is the one that everyone in the story is either trying to help or figure out what's wrong with. Her experiences are what drive the whole story forward.
Fanfiction.net is also a good place. There are many writers who contribute their works there. However, the search function might be a bit less refined compared to AO3. But still, it's worth checking for 'Laura Kinney' fanfictions.
Since I don't know the specific story, I can't tell the key elements. But usually in a covenant story, elements like the parties involved (in this case John Kinney and probably others), the purpose of the covenant, and the consequences or implications of the covenant would be important.