Sasuke and Sein could be an unexpected but fascinating pair. Sasuke's brooding and powerful presence might contrast with Sein's pure and guiding spirit. Their interactions could lead to some great character development for both of them.
Another possible pairing could be Sasuke and Elsa. Sasuke has his own dark past and a brooding personality. Elsa also has her own internal struggles with her powers. They could bond over their shared experiences of having to control something within themselves that others might fear. And their cool and somewhat aloof demeanors could make for an interesting dynamic.
Naruto and Bella could be an interesting pair. Naruto's energetic and positive nature could contrast with Bella's more introverted and moody self. It could create a unique dynamic where Naruto tries to cheer up Bella and she, in turn, shows him the more complex emotional side of the Twilight world.
Well, I think Green Lantern and Rock Lee would be an interesting pair. Green Lantern's power of creating constructs with his ring could be used in creative ways along with Rock Lee's taijutsu. Also, Wonder Woman and Hinata could be paired. Wonder Woman's combat skills and Hinata's Byakugan - enhanced fighting style would make for a great combination. And Flash and Kiba with his dog Akamaru could be a fun pair, with Flash's speed and Kiba's speed - based ninja techniques.
Naruto and Bart could be a likely pair. Both are mischievous in their own ways. Naruto is always getting into trouble with his pranks in the ninja academy, and Bart is constantly causing chaos in Springfield. They could get up to all sorts of antics together, like pulling pranks on the other characters in both universes.
Naru is a great character to include. She has a strong connection to Ori and her backstory can be further explored. For example, you could write about her younger days in the forest. Sein is also important. You could write a story where Sein's power malfunctions and Ori has to help her regain control. And Gumo, the strange spider - like creature, can add an interesting dynamic. Maybe he has a secret that only Ori can help him with.
I think Hinata and Rias could be paired up in some way. Hinata's gentle nature and her strong loyalty could complement Rias' leadership and determination. They might form an unexpected friendship or even a strategic alliance within the fanfiction's plot.
One idea could be a crossover where Naruto's skills are combined with Ori's abilities in the Blind Forest. For example, Naruto could use his shadow clone jutsu to help Ori solve puzzles or fight off enemies more efficiently.
Well, there could be a ranger type of character. They are skilled in forest survival and know the lay of the land. Another likely character is a lost traveler who stumbles into this different forest. This character brings a sense of the outside world into the forest setting. And then there are the forest - dwelling tribes or clans. They have their own cultures and traditions related to the forest and can provide a different perspective compared to the outsiders in the fanfiction.
One idea could be exploring Ori's relationship with other characters in more depth. For example, how Ori's friendship with Gumo might develop further. Maybe they could go on an adventure together outside of the forest they know.
First, you should replay the game to get a fresh feel for the world, the characters, and the story. This will help you come up with ideas that fit well within the existing lore.