In such a fanfiction, Obito might seek redemption. He could use his remaining powers to help rebuild the villages he once damaged. Maybe he would start by teaching the new generation about the true cost of war and how to avoid the same mistakes.
In the 'Obito alive after war fanfiction', the world would see some major changes. Firstly, Obito's survival could lead to a shift in the moral compass of the ninja world. His story of redemption (if there is one) could inspire others to forgive and move forward. Secondly, his combat abilities could be used to train a new generation of ninjas in a more comprehensive way. He could teach them about the importance of not only physical strength but also mental strength. Moreover, his presence might also lead to a re - evaluation of the history of the ninja wars, as he has been involved in many significant events.
There could also be interactions with the new generation of ninjas. They might view Obito as a sort of legend or a cautionary tale. Their fresh perspectives could either inspire Obito to change further or make him feel even more out of place in this new post - war ninja world.
Well, in this kind of fanfiction, Obito might face a lot of challenges in readjusting to the post - war world. Maybe he has to deal with the guilt of his past actions.
In Infinity War fanfiction, Loki can be alive. Fanfic authors have the creative liberty to rewrite the events. They might bring Loki back to life using magic or some other means. For example, Loki could have faked his death and gone into hiding, only to reappear later in the story to help the heroes fight against Thanos. His survival can add an interesting twist to the story and create new interactions between characters.
Naruto could be one of his allies. Naruto has this knack for seeing the good in people and would probably be willing to give Obito a chance to redeem himself. Also, Sakura, with her skills as a medic - ninja, could be an ally. She might help heal Obito if he was injured during the war and see the potential in him to be a force for good.
In such a fanfic, perhaps Obito could use his Sharingan powers in new and unexpected ways after the war. He might start to see the world differently and strive to make amends for his past actions. He could use his abilities to help rebuild the villages he once tried to destroy, like Konoha.
One possible fanfiction could be about Naruto and Obito teaming up to face a new, powerful enemy. They could combine their unique skills, like Naruto's Rasengan and Obito's Kamui. Their relationship could start off rocky due to their past differences but gradually turn into a strong bond as they fight side by side.
One way is through magic. Loki is a master of sorcery. He could have used a powerful spell to create an illusion of his death while he actually teleported away. Another possibility is that he made a deal with some other powerful being. Maybe he promised something in exchange for his life and the being intervened when Thanos was about to kill him.