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.
Eren's death in the manga was a powerful moment. It was brought about by a combination of his own decisions, the opposition he faced, and the overall plot developments. It left a lasting impression on readers.
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.
Eren managed to beat Annie through a combination of his determination, newfound powers, and strategic thinking. He exploited her weaknesses and caught her off guard.
Well, it all happened when Eren got hold of that special serum. When he used it, it activated a genetic trait within him, allowing him to transform into a Titan. It was a crucial moment in the story that changed everything for him.