A fanfic could focus on Indra's training. We could write about the intense and arduous training he underwent to become such a powerful figure. It might involve secret techniques passed down in the Otsutsuki clan that only he was able to master due to his unique talent.
Another angle could be a fanfic where Indra Otsutsuki travels to a different dimension. He has to adapt to a completely new world with different rules and powers. It would be fascinating to see how his Otsutsuki abilities fare in this new environment and how he interacts with the local inhabitants.
One idea could be Indra Otsutsuki crossing over into a modern-day world. He could struggle to adapt to the new technology and social norms while still having his powerful ninja abilities. Maybe he meets a group of people who initially fear him but then come to understand his situation and help him navigate this strange new world.
To create a believable character of Indra in a crossover, you need to stay true to his original traits. Remember his pride and his powerful ninja skills. So, if he crosses into a different world, he should still carry that sense of self - importance. For example, if he's in a world of magic, he might initially look down on the local mages until he realizes their powers are different but not necessarily inferior.
One aspect of 'indra and sakura fanfic' could be the exploration of their relationship. Maybe it delves into how they meet and the initial attraction between them. For example, they could meet in a magical forest, with Indra being drawn to Sakura's kind heart and Sakura being intrigued by Indra's mysterious aura.
One possible plot could be that Naruto discovers he has some hidden Otsutsuki bloodline. This leads to him being ostracized by some in the village who fear his new - found power. He then has to go on a journey to learn about his Otsutsuki heritage, facing challenges along the way and also having to prove that he's still the same Naruto at heart.
One great 'Naruto Kaguya Otsutsuki Fanfic' is 'The Legacy of Kaguya'. It explores her backstory in a very detailed way. It shows how she came to be the powerful being she was in the Naruto series. The author does a great job of creating new scenarios that fit well with the existing Naruto lore.
The potential for different storylines is vast. It could be a story of love against all odds, or a tale of two individuals coming together to achieve a greater good. There are many ways their personalities can interact and lead to exciting plot twists.
Yes, there might be some available on fanfiction platforms. You can start by checking websites like Archive of Our Own. There could be various interpretations of the relationship between Indra and Ashura in these fanfics.