She could be someone with a special bloodline or ability. Maybe she has a unique form of chakra that gives her certain powers. In the context of training Naruto, her skills and knowledge are what make her important. She could be a mysterious figure who has been observing Naruto for a while and decides to take him under her wing to help him reach his full potential. For instance, she might have the ability to see the latent potential in others and wants to shape Naruto into a great ninja not just for his own sake, but also for the greater good of the ninja world.
Selphe might be a character with a backstory related to an ancient prophecy or a long - lost ninja art. Her role in training Naruto could be part of fulfilling that prophecy or reviving the lost art. She could have her own motives for training Naruto, like seeking revenge against a common enemy or trying to restore balance to the ninja world. And her methods of training could be unorthodox compared to what Naruto has experienced before, pushing him to his limits and beyond.
In a 'naruto trained by selphe fanfic', perhaps Selphe comes from a different ninja clan with ancient techniques. She could teach Naruto how to combine his existing Rasengan technique with her clan's special chakra manipulation. This would make Naruto's attacks even more powerful and unpredictable. Also, Selphe might train Naruto in mental discipline, which would help him better handle the stress of battles and his role as a future Hokage.
Kosuke might be a character created specifically for this fanfic. He could be someone with a unique background, like perhaps he was once a disciple of a great ninja but then went on his own path. And now he sees potential in Naruto and decides to train him. He could have abilities that are different from the main characters in the original Naruto series, which is why he has something new to offer to Naruto in terms of training.
In this fanfic, Lilith could be an original character created by the author. She might be a powerful and mysterious figure with special abilities that make her suitable to train Naruto.
There could be new antagonists created specifically for this fanfic. Maybe some dark forces that were sealed away by Asura long ago are awakened. They would oppose Naruto because they see him as a threat to their resurrection or their evil plans.
The main characters are Naruto, the well - known ninja from the Hidden Leaf Village, and Vergil, who is likely from another realm or universe with his own set of powerful skills. In this fanfic, their interaction forms the core of the story as Naruto looks to Vergil for training and growth.
It could be some rogue shinobi who are after Pakura's knowledge. Since she's training Naruto, they might see it as an opportunity to get to both of them and steal their techniques. Maybe they were once her enemies or just power - hungry individuals.
Maybe it's a member of a long - lost ninja clan. This clan member could have some special skills and knowledge that they want to pass on to Naruto. They choose to train him in secret to protect their clan's secrets from falling into the wrong hands.
The Otsutsuki clan members other than Kaguya could be antagonists. Since Kaguya is training Naruto, they might see Naruto as a threat to their plans.
Sora is likely a character created within the fanfic world. He could be a powerful shinobi with unique abilities that Naruto can learn from. Maybe he has a special chakra nature or some extraordinary combat skills.
The Hokage, like Tsunade or Kakashi, could be the ones training Naruto. They know Naruto well and have a lot of knowledge and skills to pass on.