Well, it depends on how the apology is received. If Mikasa fully accepts it, it could be a turning point for them. They might become closer allies, relying on each other more than ever. But if she is skeptical, it could create a new kind of tension. Eren might have to work hard to prove his sincerity. In any case, their relationship would no longer be the same as before the apology. There would be a new layer of complexity added, with both of them having to navigate through their changed feelings and the newfound vulnerability in their connection.
His apology might initially cause some confusion in their relationship. Mikasa has been used to a certain dynamic with Eren, and this change could throw her off. However, in the long run, it could be positive. They could start to see each other in a new light. Eren might become more protective of Mikasa in return, and Mikasa could be more open with Eren about her own desires and fears. For example, they could start to plan for a future together, something that was previously unthinkable due to the tension between them.
Eventually, Eren might start to investigate the reasons behind Mikasa's betrayal. If he discovers that there are more complex factors at play, like she was forced or there was a misunderstanding, he could feel a mix of guilt for his initial reaction and relief that their relationship wasn't as broken as he thought. However, if he finds out that she truly betrayed him out of her own will, he might become even more determined to carry out his plans, whatever they are, without her.
The baby could bring them closer. They'd have a new shared responsibility, which would strengthen their bond. They'd be more focused on each other and the family they're creating.
Often, in these fanfictions, Eren develops more empathy. He starts to really understand Mikasa's feelings. For example, he might realize how much his actions impact her and become more cautious. He becomes more of a protector instead of just a fighter.
Armin is often a popular character. He might be like a wise uncle figure to Eren and Mikasa's family, offering advice and support. Another could be Levi. He could be the strict but caring mentor to their children, teaching them important skills.
Mikasa has always deeply loved Eren. Her love for him is shown through her constant protection. From their childhood days, Mikasa has been by Eren's side, ready to fight for him. Eren, in his own way, also holds a special place for Mikasa in his heart. Their relationship is complex and filled with unspoken emotions, especially in the face of the many challenges and battles they encounter together in the world full of Titans.
It's often shown as a very deep and profound connection. Mikasa's love for Eren is so strong that she's willing to risk her life for him at any time. In fanfiction, this can be exaggerated in a good way. Writers might show Eren finally reciprocating her love in a more emotional and open way compared to the anime or manga.
Character development is key. It should show how their relationship has evolved over time to reach that kiss moment. For instance, if it's set in the original 'Attack on Titan' universe, it should account for all the hardships they've been through together.
A fanfiction with Eren apologizing to Mikasa could be set in a post - apocalyptic world where they are trying to rebuild. Eren realizes that his actions have not only affected the big picture but also his relationship with Mikasa. He apologizes for his recklessness. Mikasa, being the strong - willed character she is, might be hesitant to accept at first, but then realizes that this is a new start for them. They could then start to work together more closely, with a new understanding and respect for each other.
There's a fanfiction where Eren gets injured badly in a fight, and Mikasa has to take care of him. During this time, they have deep conversations about their past, their feelings for each other, and what they hope for the future. It shows a more vulnerable side of their relationship.
I would recommend 'Eren and Mikasa's Adventure'. In this fanfic, they embark on an exciting journey together. The plot is full of twists and turns, and the way their characters are written is very in - character. It's a long read but definitely worth it if you're a fan of their relationship.