One interesting plot could be that in his Titan form, Eren has a special connection with Mikasa. Maybe he can communicate with her telepathically only when in Titan form. This could lead to them working together more closely in battles, with Mikasa being able to anticipate Eren's moves better. For example, during a fight against a horde of Titans, Eren's Titan form sends a mental signal to Mikasa about a weak point he's discovered on a huge Titan. Mikasa then uses this information to take it down swiftly.
The relationship might also be depicted as a source of inspiration. Eren's Titan form could inspire Mikasa to be even more fearless. She could see his strength and determination in that form and strive to match it. And in return, Eren could be inspired by Mikasa's unwavering loyalty. This mutual inspiration could drive the story forward, with both of them growing as characters throughout the fanfiction.
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.
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.
A 'Attack on Titan Trans Mikasa Fanfic' could potentially change the entire dynamic of the original story. If Mikasa is transformed in some way, it might affect the way she interacts with other characters. For instance, her interactions with Armin could become more complex. The fanfic might also explore her backstory in a more detailed manner, perhaps uncovering hidden aspects of her family or her upbringing that were not fully explored in the original series.
There are many great fanfictions about Sasha and Mikasa. Some might focus on their friendship within the Survey Corps. They could be shown having heart - to - heart conversations during their down time, sharing their fears and hopes. Maybe they bond over their love for a certain food, like Sasha's love for meat and Mikasa's simple pleasures in the scarce good food they get.
In some fanfics where Mikasa dies in Attack on Titan, it could lead to a major shift in Eren's character development. He might lose his last tether to his humanity and spiral into an even darker path. Her death could also cause Armin to become more determined in the fight against the Titans, as he would be driven by the loss of his dear friend.
Yes, there is a complex love story between them. Mikasa has always been deeply in love with Eren. She is extremely protective of him throughout the series. Her love for Eren is one of the driving forces behind her actions.
There could be. 'Attack on Titan' has a huge fan base, and fanfiction writers like to explore different aspects of the characters' lives. Mikasa is a very popular character, so it's not surprising that some might write a story where she is pregnant. But you might need to search through different fanfiction platforms to find them.