A common theme could be the exploration of their relationship dynamics. Given their characters in Soul Eater, the fanfiction might focus on how they interact, whether it's in a friendly way or something more complex.
One possible plot could be that Justin and Giriko start off as rivals. They constantly compete in battles within the Soul Eater world. As they face various threats together, they gradually develop a grudging respect for each other. This respect then slowly turns into an unexpected friendship. And through their friendship, they learn more about each other's pasts and what led them to be the way they are.
The relationship might start with mistrust. Giriko is known for his wild nature and Justin for his more composed self. But when they have to rely on each other in a tough situation, like being trapped in a dangerous maze in the Soul Eater realm, they begin to break down the barriers. Justin might use his intelligence to find a way out while Giriko uses his brute strength to fend off any threats within the maze. This cooperation could be the start of a more positive relationship.
You could also try reaching out to the Soul Eater fan community on social media platforms like Reddit or Tumblr. Fans often share their favorite fanfictions there. Maybe someone has already read and can recommend some great Giriko x Justin fanfiction.
One great Crona x Soul fanfiction is 'The Bond Beyond'. It delves into how Crona and Soul's relationship develops in a more in - depth way than in the original series. It shows them learning about each other's pasts and how they grow together. Another one could be 'A Different Kind of Friendship'. This fanfiction focuses on how they start as friends but there are hints of deeper feelings emerging as they face various challenges in the world of Soul Eater.
I think it is. The plot has depth, the action scenes are exciting, and it has a good mix of humor and drama. However, it might not be for everyone depending on personal preferences.