Friendship is another wonderful theme. Maybe they have a heart - to - heart conversation about their past traumas and how they've coped with them. They could be sitting by a campfire after a tough battle, sharing stories and realizing how much they mean to each other as friends, not just comrades in arms.
One positive theme could be their friendship. They could go on adventures together, solving mysteries outside of Hogwarts. For example, they might explore ancient wizarding ruins in search of lost spells or artifacts. Another theme could be their academic achievements. They could study together for advanced magical subjects and help each other out in their research, like finding a cure for a rare magical disease.
One positive theme could be her leadership skills. Fanfic could explore how she leads her guild, makes important decisions, and overcomes challenges as a leader.
Trust is a big theme. Their relationship is built on trust in fanfic, and many stories revolve around how they maintain that trust even in difficult situations. Also, the theme of sacrifice often comes up, as they are both willing to sacrifice for each other.
One common theme is loyalty. Their loyalty to each other, whether in the face of danger or difficult decisions, is often explored. For example, in many fanfics, they will stand by each other no matter what the cost.
One positive theme could be their mentorship relationship. Levi could be shown guiding Eren in his growth as a fighter and as a person who is key to the survival of humanity in the 'Attack on Titan' world.
One great idea could be a fanfic about their adventures after the end of the series. For example, they could be traveling to different parts of the world to help people rebuild after the war. This would focus on their selfless and heroic natures.
Another good theme could be their training together. How they help each other improve their combat skills or strategic thinking, which is in line with their characters' traits in the original works.
One positive theme could be her academic achievements. For example, a fan fiction could explore how she discovers a new branch of magic through her intense study. Another theme could be her friendship with Harry and Ron, like writing about a time when they faced a difficult situation and her loyalty to them was tested and shone through. Also, her work in the wizarding world post - Hogwarts, such as her efforts in improving the rights of house - elves, could be a great theme for fan fiction.
One positive theme could be a story about characters coming together to volunteer during Christmas. They could help at a local shelter, distribute gifts to the poor, or organize a Christmas dinner for the homeless. This theme promotes the spirit of giving and kindness which is at the heart of Christmas.
A great positive fanfic idea would be to write about how they work together to bridge the gap between ghouls and humans. They could start some sort of underground movement where they try to promote peace and co - existence. This would focus on their characters' strong wills and the positive impact they can have on the world they live in.