Well, to play ghost stories solo, first, set the scene and decide on the type of ghost and the setting. Then, think of challenges or tasks the character might face. It's like telling a story to yourself but with a creepy twist!
One possible fanfic could be about Mikasa's transformation into a Titan being a unique situation in the 'Attack on Titan' world. Maybe she has different abilities compared to other Titans. For example, she could retain more of her human consciousness and use her combat skills in Titan form. This would create an interesting dynamic as she tries to protect her friends while being a Titan, which is usually seen as an enemy.
One great 'Attack on Titan' fanfiction with a Titan reader is 'Titan's Perspective'. It delves into how a reader - turned - Titan experiences the world within the walls. It offers a unique view of the familiar 'Attack on Titan' universe, exploring the inner thoughts and struggles of a Titan, which is something not often explored in the original series.
One possible fanfic plot could be that Eren has been planning this for a long time. He might gather intelligence about the Colossal Titan's weaknesses. Then, in a fierce battle, he manages to get close enough to deliver a fatal blow. This could be a very emotional moment for him as well, considering the history between them.
One popular fanfiction idea could be a story where Eren has to team up with the Female Titan against a new, more powerful enemy in the world of Attack on Titan. Maybe they start off as reluctant allies, but as they face challenges together, they begin to understand each other better and develop a unique bond.
Writers can give the Female Titan more depth by exploring her emotions. Even though she is a Titan, she can still feel things like anger, fear, or regret. For example, showing her hesitation before attacking a particular character can make her more interesting.
A great plot for such a fanfic could be that Mikasa's Titan form is a result of a connection to an ancient Titan power. As she becomes a Titan, she starts to have visions of the past, of how the Titans came to be. She then decides to use this knowledge and her new form to try and end the Titan - human conflict once and for all. Along the way, she has to face her friends who are initially scared of her but eventually come to accept her new form as she proves that she is still the same Mikasa deep down, just in a different body.
The uniqueness of Baby Titan fanfiction lies in its ability to explore uncharted areas of the Attack on Titan universe. Since the main series focuses more on the older and more menacing Titans, the Baby Titan offers a fresh perspective. It allows writers to play with the idea of innocence within the context of the Titans, which is a huge contrast to the typically violent and destructive nature of the regular Titans.