Lightning Farron might also fit into the story by being a mysterious outsider. The RWBY characters could be initially suspicious of her, but as they get to know her, she becomes an important part of their group. She could introduce new concepts from her own world, like different types of weapons or fighting styles.
One of the appealing aspects of including Lightning Farron in RWBY fanfiction is the potential for crossovers. Writers can explore how the technology and magic of her world interact with the Grimm - filled world of RWBY. It also allows for character development for both Lightning and the RWBY characters as they face new challenges together.
I'm not sure specifically as there could be many different interpretations in this fanfiction. It might be about Naruto having some connection to a character named Lightning Farron, perhaps in an alternate universe where Naruto's origin or abilities are related to this new element of 'Lightning Farron'.
One common theme is identity. Since she's in a crossover situation, Lightning often has to re - evaluate who she is in the new context. For example, in crossovers with other fantasy worlds, she might question her role as a warrior.
He fits by being an overpowered character that disrupts the normal power balance. This can make for interesting stories as the RWBY characters have to adapt.
Obviously Naruto is one of the main characters since it's in the title. And Lightning Farron is likely to be a main character too, as Naruto is supposed to be his son in this fanfiction. There may also be other Naruto - universe characters like Kakashi or Jiraiya who could play important roles in the story.
One great Lightning Farron crossover fanfiction is 'Lightning in Another World'. It has an interesting plot where Lightning is transported to a different universe and has to adapt to new challenges. The story does a great job of keeping her character true to the original while also exploring new relationships.
One idea could be that Dark Lightning Farron discovers a hidden power within himself during a great battle. This new power changes the course of the war he is involved in.
There could also be an old and wise wizard named Merlin. Merlin has vast knowledge and magical powers that he uses to guide Dark Lightning Farron on his adventures. He can also be a source of comic relief at times with his eccentric ways.
One possible storyline could be a redemption arc for Galenth Dysley. In fanfiction, Lightning Farron might be the one to see through his wrongdoings and try to guide him towards a better path. Maybe she discovers some hidden good in him that was overshadowed by his power - hungry actions in the game.
A Saiyan could fit in as a new student at Beacon. They would bring their unique fighting style and powers. For instance, they could use their tail as an extra weapon or sense danger like they do in their original lore.