eren meets up with the yeagerists

In the manga, Eren and Mikasa don't have a romantic ending together. Their relationship is complex and goes beyond traditional romance. The story focuses more on larger themes and plot developments rather than a conventional pairing up of these two characters.

In fanfiction, when Eren meets Levi in the underground, they might initially have a tense encounter. Levi could be suspicious of Eren's motives. For example, he might question Eren's presence there as the underground is a dangerous and lawless place. Eren, on the other hand, could be in awe of Levi's skills and reputation.

No, they don't. Their relationship doesn't culminate in a romantic ending together.

Well, they might have a deep conversation about their different views on the world. Eren could try to convince Zeke of his more radical approach to saving the Eldians, while Zeke might push back with his own ideas of euthanasia for the Eldians. It could be a very tense encounter.

They could start to plan a strategy to deal with the Marleyans together. Since both have their own experiences with Marley, they might come up with a complex plan involving Titan powers and political manipulation. For example, using Zeke's position as a Marleyan weapon and Eren's influence within Paradis.

Well, in eren and annie lemon fanfiction, Eren may be depicted as having a strong, almost obsessive attraction to Annie. His character might be written to be very determined in his pursuit of her. Annie could be presented as having a complex mix of emotions. She may initially resist Eren's advances due to her own guarded nature, but then gradually give in. These characteristics are often used to create a more intense and emotional relationship dynamic in the fanfiction. However, it's important to note that this is a departure from the official story and is the creative interpretation of the fan authors.

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.

Female Eren in this fanfiction is often portrayed as headstrong. Just like her male counterpart, she has a strong sense of justice and is determined to fight for what she believes in. She is also likely to be brave, not afraid to face danger head - on, whether it's in battle or when confronting the complex relationship with Levi.

Armin could be one of the main characters. He might be the one who offers the most logical advice to Eren during his pregnancy. For example, he could help Eren figure out how to deal with the medical aspects if the world in the fanfiction has different rules for male pregnancy. Another character could be Mikasa. She would probably be very protective of Eren, just like she always is. She might be the one to stand up for Eren against any discrimination or threats he faces because of his pregnancy.

Yes, there might be. The Naruto and Attack on Titan fandoms are both huge, and fans often like to cross over their favorite characters in fanfiction. So it's quite possible to find Eren - from Attack on Titan - in Naruto fanfiction. However, it may not be as common as fanfictions within each respective universe.