There could be a character who is a half - human, half - insect hybrid as a result of a strange experiment. This character has the strength and abilities of both humans and insects. He can fly like an insect and also use human - like jutsu. His appearance might be a bit strange, with insect - like wings and antennae, but he has a kind heart and uses his powers to protect the weak. A third character could be a ninja from a foreign land who has a unique style of insect summoning that no one in the Naruto world has seen before.
One popular storyline could be the insect summoner's journey to master new and rare insect species. For example, they might discover a powerful and ancient insect tribe deep in the forest that no one has ever summoned before. Another storyline could involve the insect summoner forming an unlikely alliance with other ninja clans using their unique abilities. Maybe they team up with the Inuzuka clan, with the insects helping to track enemies while the Inuzuka's dogs provide combat support.
The Nine - Tailed Fox in a more malevolent and uncontrolled form could be an interesting horror character. Instead of the somewhat tamed version we see with Naruto, it could be a wild, blood - thirsty entity that spreads destruction.
In some fanfictions, there's an original character who is a master of both ice and lightning techniques. This character has a mysterious past and often clashes with the Ice Dragon Slayer at first but later becomes an ally. They bring a new dynamic to the story as they can combine their powers in unexpected ways. Another interesting character is a healer who has a special connection to the Ice Dragon Slayer. They can heal the slayer's wounds in a way that also enhances their ice powers, which is really cool. There's also a character who is a rogue ninja that has been studying the Ice Dragon Slayer from afar and has some devious plans related to their powers.
One interesting storyline could be a young ninja who discovers a rare and powerful insect summon. For example, they might find a group of glowing beetles that can create illusions. The ninja then has to learn how to control and use these beetles in battles against other powerful foes in the Naruto universe.
One interesting original character is Lyra. In August Fairy Tail Fanfiction, she is a healer with a special power that can not only heal physical wounds but also emotional traumas. She often gets involved in the most dangerous missions because of her valuable skills. Another character is Finn. He is a thief - turned - good - guy. His skills as a thief are now used to help the Fairy Tail guild in various ways, like stealing important artifacts from the bad guys before they can use them. And there's Seraphina, a powerful sorceress who has a connection to the celestial world and often gives the Fairy Tail mages celestial - related quests.
For Harry Potter cursebreaker fanfiction, an interesting character could be Finn. Finn is a self - taught cursebreaker who grew up in the wizarding slums. He has a rough exterior but a heart of gold and a natural talent for breaking curses. He often uses unorthodox methods that other cursebreakers might scoff at. Another character is Seraphina. She is a cursebreaker who is also a seer. Her visions sometimes help her in her cursebreaking work, but they can also be a hindrance as they are often unclear. And a third character is Eamon. Eamon is a cursebreaker from a long line of cursebreakers in Ireland. He has a deep knowledge of Celtic magic and uses it to break curses that are related to ancient Irish curses.
There could also be a character like Dara, a smuggler who gets caught in the middle of the New Sith Wars. She doesn't care about the Jedi - Sith conflict at first, but as the war escalates, she realizes she has to choose a side to protect her own interests. She could be a morally ambiguous character, willing to do whatever it takes to survive.
A young inventor - trainer. This character is constantly modifying Pokeballs to give their Pokemon unique advantages in battles. For example, a Pokeball that releases a small burst of energy to boost their Pokemon's first attack in a battle. They enter the Champions League with their homemade gadgets and their trusty Pikachu, which they have trained to use electric attacks in new and creative ways.
One interesting original character could be a young ninja who is in awe of the Black Fire Dragon Slayer. This character might start off as a weakling but is inspired by the slayer to train harder and develop their own unique abilities. Another could be a mysterious old man who has knowledge about the origin of the Black Fire Dragon Slayer's powers and guides them on their journey. And there could be a female ninja who has a rivalry with the slayer at first but later becomes their ally and love interest.
Orochimaru is often a central character in such fanfictions. He is a well - known snake summoner in the Naruto series, and fanfictions may expand on his backstory or create alternate timelines for him. Another popular character could be Anko Mitarashi. She has some connection to snakes, and fanfictions might explore her relationship with snake - related powers more deeply. And there are often original characters created by the fanfiction writers themselves. These original snake summoners can bring new and unique storylines to the Naruto universe.