One idea could be that the OC has a special power related to the sky that no one expected. For example, they can manipulate the air in ways that are not typical for the Arcobaleno powers. Maybe they can create solid air constructs that can be used for defense or offense.
Well, you could base your 'new sky arcobaleno oc fanfiction' on a time - travel concept. Have your OC travel back in time to the origin of the arcobaleno and change certain events. This would not only create a complex and engaging plot but also allow for a lot of character development. Or perhaps make the OC a healer, using their sky - related powers to heal not just physical wounds but also emotional traumas of the other characters. This would give a fresh perspective on the arcobaleno world.
The OC could start as an adversary to Tsuna. Maybe the OC initially misunderstands Tsuna's intentions and sees him as a threat to the balance of the Arcobaleno world. But as time passes, they realize Tsuna's good heart and start to work with him.
One interesting story could be about an OC who discovers a hidden power within the Sky Arcobaleno heritage and has to learn to control it while facing various challenges from other Arcobaleno. It might involve a journey of self - discovery and making unexpected alliances.
One idea could be to create an OC who has a unique power related to the Arcobaleno curse. For example, an OC that can temporarily nullify the curse's effects on the Arcobaleno for a short period. This would add an interesting dynamic as the OC would be both a help and a potential target.
Maybe a fanfiction where a character from the Harry Potter series discovers they have a connection to the Sky Arcobaleno. This could lead to a whole new adventure as they try to understand this new part of their identity and how it fits into the wizarding world. They might have to travel to new places and meet new characters from both universes.
Well, perhaps the OC reborn as Kurama tries to find a way to coexist peacefully with the jinchuriki in a different way than in the original story. They could use their unique perspective to broker better relationships between the tailed beasts and the humans. Maybe they also try to uncover secrets about the origin of the tailed beasts that were previously unknown.
One idea could be an OC who has a special power related to time manipulation in the 'hitman reborn' universe. They could use this power to change the outcome of battles or prevent certain tragedies. Another could be an OC that is a long - lost relative of one of the main characters and has a different view on the mafia world, causing some internal conflicts.
One idea could be that the OC, reborn as Naruto, uses their prior knowledge to quickly master jutsu. For example, they might know about the Rasengan from the start and be able to perfect it faster. Another plot could involve the OC changing the relationships in the village. Maybe they befriend Sasuke earlier and prevent his defection. Or they could introduce new ninja techniques from their past life to the Hidden Leaf.
Another plot could involve an OC reborn into the body of a criminal in the Naruto world. They have to struggle to redeem themselves and prove that they are not the same person as the original criminal. Along the way, they could discover the real reasons behind the original criminal's actions and try to right the wrongs that were committed.
One idea could be that the reborn OC genius uses their extraordinary intelligence to solve a mystery that has baffled the entire community. For example, they might figure out the secrets behind an ancient artifact's power.