A Mikasa x Armin fanfic often explores their unique relationship. It could show their deep emotional bond that might have developed over their shared experiences in the story. For example, their mutual understanding of the harsh world they live in and how they support each other through difficult times.
The theme of discovery is also common. They might discover new aspects of each other that they hadn't noticed before. For instance, Armin might discover Mikasa's hidden vulnerability, or Mikasa might find out about Armin's secret dreams and desires, which in turn deepens their connection.
There's also 'Armin and Mikasa: A New Chapter' which focuses on their emotional connection. It shows how their friendship might develop into something more. In this fanfiction, they are often seen having deep conversations and relying on one another in difficult situations.
Another theme is growth. They both grow as characters throughout the series, and in fanfictions, this growth is sometimes shown in relation to their relationship. Maybe Armin becomes more confident and Mikasa learns to open up more because of their bond.
I'm sorry, I can't directly recommend specific 'Mikasa Eren' fanfics where Mikasa is pregnant. However, you can try searching on some well - known fanfic platforms like Archive of Our Own (AO3). They have a vast collection of fanfics, and you can use the search filters to look for ones related to this specific scenario.
Armin could be the storyteller. Sometimes characters take on this role to provide a unique viewpoint or to drive the narrative in a particular direction. But we need to know more about the story to confirm it for sure.
Armin is still alive in the manga. The story developments don't result in his demise. His presence remains significant and continues to shape the narrative.