One idea could be a mercenary who has a unique Kekkei Genkai that makes them highly sought after in the Naruto world. For example, a power to manipulate time on a small scale, which could be useful in both combat and espionage. Another idea is a mercenary team made up of outcasts from different villages who come together for mutual gain. They could take on jobs that no one else would, like rescuing prisoners from a highly fortified prison.
A cool concept could be a mercenary who is secretly working for a major villain but pretends to be a neutral party. They could be gathering information and causing chaos in the ninja world without anyone suspecting their true motives. Maybe they have a special ability to disguise their chakra signature, making it difficult for even the most skilled sensors to detect them. This would add an element of mystery and intrigue to the fanfiction.
Well, you could have a mercenary who specializes in retrieving lost or stolen ninja tools. They might have a network of informants all over the Naruto world. Their adventures could take them to different hidden villages and ancient ruins. They could also get involved in power struggles between different clans who are after the same valuable ninja tools. This would create a lot of action and conflict in the story.
A possible plot could involve the banished mercenary being from a long - lost clan. The reason for his banishment was a false accusation by a rival clan. As he wanders the Naruto world as a mercenary, he discovers clues about his clan's true heritage and power. He then uses his skills as a mercenary to gather allies and resources to prove his clan's innocence and restore its honor. Along the way, he crosses paths with Naruto and his friends and they either help or hinder his quest depending on the situation.
One idea could be that the banished mercenary has unique jutsu skills learned from different lands during his mercenary days. He could return to the Naruto world with a new perspective and hidden motives, perhaps trying to unite different ninja clans against a new, greater threat. Another plot idea is that he has a connection to an ancient prophecy that was thought to be forgotten, and his banishment was actually part of a grand scheme to protect him until the time was right.
One interesting aspect could be the unique character interpretations. In a mercenary Naruto fanfiction, characters might be shown in a more morally ambiguous light. For example, Naruto could be portrayed as a mercenary with a different set of values compared to his canon self. He might have to make tough choices between money and his ninja way.
Well, one interesting aspect could be how Naruto's character traits are adapted to fit the role of a mercenary. His ninja skills might be used in a more self - serving and money - driven way. For example, his speed and combat abilities could be put to use in different mercenary missions.
One idea could be a mercenary who is hired by a mysterious client to steal an ancient relic from Beacon Academy. He has to navigate through the various defenses and teams of Huntsmen and Huntresses.
One interesting idea could be a mercenary who is secretly working for Dumbledore. They might be on a mission to infiltrate the Death Eaters' ranks. Another could be a mercenary with unique magical abilities not seen in the original books, like the power to manipulate time in small increments for strategic purposes during battles.
One idea could be a mercenary who is hired by a mysterious Sith Lord to steal a powerful Jedi artifact. The mercenary then has to navigate through various planets, dealing with both Jedi and Sith along the way.
Give them a tragic backstory. For example, they could be a survivor of a village massacre and turned to mercenary work to survive. This would make them more relatable and add depth to their character.
One idea could be exploring the backstories of the mercenaries in more detail. For example, delving into how Revy became such a skilled fighter. Another could be creating a new mission for them that involves a powerful and mysterious enemy. Maybe a shadowy organization that has ties to their pasts.
One interesting idea could be the combination of Naruto's ninja skills with mecha technology. For example, Naruto might use his chakra to power up the mecha in unique ways. Another idea could be the new enemies that are created specifically for this mecha - Naruto concept, like robotic shinobi that require different combat strategies compared to normal foes. Also, the design of the mecha Naruto itself can be really cool, perhaps with features inspired by the Nine - Tails.