Shisui could be a protector. Just as he was loyal to his village in Naruto, he could be protective of Hogwarts in the fanfiction. He might use his Sharingan to detect any hidden threats or dark magic. For instance, if Death Eaters were planning an attack on the school, Shisui could sense their intentions and warn the professors and students.
One way could be through a magical portal. Imagine a portal opening between the Naruto universe and the Harry Potter world. Shisui, with his Sharingan abilities, could be a unique addition. His teleportation jutsu might be mistaken for a new form of Apparition in the wizarding world. Also, his skills in combat could be put to use in battles against dark wizards. For example, his ability to quickly assess and counter an opponent's moves would be very useful in duels at Hogwarts.
Well, Naruto saving Shisui in a fanfiction could be really interesting. Naruto is known for his never - give - up attitude. If Shisui is in some sort of genjutsu - related trouble, Naruto could use his own strong will, which he has shown against powerful genjutsu like Itachi's Tsukuyomi, to break Shisui free. And his Sage Mode would give him an extra edge in combat if there are opponents to fight off while rescuing Shisui.
One great Naruto and Shisui fanfiction is 'The Legacy of Shisui'. It delves deep into how Shisui's actions and ideals could have influenced Naruto in ways not shown in the original series. It has an engaging plot that keeps you hooked from start to finish.
In some fanfictions, Harry might use his magic skills. For example, he could use spells to protect Naruto from a powerful enemy. Maybe he casts a shield charm to block an attack that Naruto couldn't avoid on his own.
I really like 'Shisui's Redemption'. In this fanfiction, Shisui is given a chance to correct the wrongs that happened to his clan. It's interesting because it shows a different side of him, one that is more determined and heroic. The author does a great job of building the world around him and making the story feel like it could be a part of the original Naruto universe.
I'm not entirely sure if there is a specific one with that exact premise. However, fanfiction authors are constantly coming up with new and unique concepts. Given the popularity of both Harry Potter and Naruto, it's possible that someone has written a story where Harry Potter is a blacksmith within the context of a Naruto fanfiction. It could be an interesting take on the characters and their worlds, perhaps exploring how Harry's skills as a blacksmith could interact with the ninja world of Naruto.
Yes, it can be a somewhat common theme in fanfiction. Some fans like to explore alternative relationships and scenarios that deviate from the original story. In these fanfictions, Sakura might be written to use her charm or certain actions to get closer to Shisui, often for various reasons like love, power, or just for the sake of creating an interesting plot twist.
Perhaps Naruto saves Shisui from a group of rogue ninjas. He uses his speed and agility, enhanced by his training with Jiraiya, to quickly reach Shisui. His Nine - Tails chakra could also flare up, intimidating the enemies and giving him the power to fight them off.
One possible plot could be that Shisui discovers Naruto living in a difficult situation, perhaps being ostracized in the village. Shisui decides to take him in. He then starts training Naruto in his unique ninja skills. Naruto would grow up with Shisui's values and teachings, and this would change the way he approaches his goals in the ninja world.