One potential villain could be Orochimaru. He might have an interest in Naruto's sister for her unique chakra or some genetic trait. He could be using her as a pawn in his experiments to gain more power or knowledge about the Uzumaki clan.
In some fanfictions, Naruto's sister could be in a coma due to a curse. Naruto discovers a rare herb or a special chakra technique that has the potential to wake her up. He has to overcome many challenges, including political opposition within the Hidden Leaf Village who think he's wasting resources on his sister.
Perhaps the story could start with Naruto finding out that his sister is in a secret location held captive by a dark organization. He embarks on a journey full of challenges. Along the way, he has to overcome various traps and face off against strong opponents. His shadow clones could play a crucial role in distracting the enemies while he reaches his sister. Once he does, he uses his chakra to break any bindings and brings her to safety, all while showing his growth as a ninja and a brother.
The following are some novel recommendations about a man saving his amnesiac sister:
1. " At the same time, the one who is saved from drowning is the younger sister ": This was a short romance novel, telling the story of the male protagonist saving his younger sister who had amnesia. This novel is highly recommended. The plot is fascinating.
2. " Detour of the Heart ": This novel tells the story of the female protagonist meeting the male protagonist again and falling in love after losing her memory in a car accident. However, when the female protagonist regained her memory, the male protagonist refused to admit their relationship, causing the female protagonist to be hurt.
3. In this novel, the male protagonist was saved by the female protagonist after being injured.
Please note that the novels recommended above may only be part of the results. There may be other novels that are suitable for you.
It could be a new, self - made villain. Maybe a rogue ninja who was once rejected by the Hidden Leaf Village. He blames Naruto for his misfortunes and decides to target his sister as revenge. This villain would have his own set of unique and dangerous jutsu, which Naruto would have to figure out how to counter in order to save his sister.
In the Naruto series, Naruto doesn't have a biological sister in the original story. So in this fanfiction, the author probably creates a new character to be his sister. It could be an original character with unique abilities and a complex backstory that leads to the situation where Naruto dies by her hand.
She could be an original character created specifically for this fanfiction. The author might give her unique abilities and a distinct personality to make the story more interesting.
One possible plot could be that Naruto discovers a new and powerful enemy who is targeting his family. He then uses his ninja skills and the power of friendship to defeat the enemy. For example, he might team up with his old friends like Sasuke and Sakura. They would go on a dangerous journey, face many challenges, and in the end, Naruto manages to save his family.
One plot could be that Naruto, through some mysterious prophecy, learns that he has the ability to save his mother. He embarks on a journey to find the key to unlocking this power. Along the way, he meets an old sage who gives him a series of trials. As he passes these trials, he gradually unlocks the power needed to travel back in time and save his mother from the hands of the enemy.
Well, in some versions of the fanfiction, Naruto might use his newfound powerful jutsu. Maybe he masters a time - travel jutsu and goes back to the moment before his father's death to change the outcome.