A witch character with the power to create illusions that are even more powerful than those in the ninja world would be really fascinating. She could use these illusions to deceive Naruto's enemies or even to teach Naruto new ways of using illusions himself. Also, a witch who has a deep connection with nature and can use nature's magic in the middle of the ninja world's battles would be quite an interesting addition to the fanfiction.
She could be an adversary to the Fellowship. For example, she might try to stop them from destroying the One Ring by setting up various traps or sending her minions after them. Or she could be a tempter, like how Sauron tempted people with power. The witch could offer the characters false promises of great power if they abandon their quest.
Yes, there could be. For instance, a new character might be introduced who is either a carrier of the G virus or a scientist trying to understand and stop it. This character could have unique abilities or a complex backstory related to the virus.
There could be a variety of characters. There might be a young protagonist, perhaps a child who is on a journey of discovery. This character could be facing challenges and learning important lessons along the way.
One important character is Merlin. He has great magical powers and knowledge that can assist Arthur in his encounter with the witch. He can foresee things and give Arthur strategic advice. Sir Gawain is also significant. He is known for his courage and loyalty to Arthur. When it comes to the witch situation, he may be one of the knights to stand by Arthur's side and fight. Then there's Morgan le Fay. She has her own magic and sometimes has a complex relationship with Arthur. She could be related to the witch in some way or be another factor Arthur has to consider in the story.
Vision is an important character. He has a deep connection with Scarlet Witch. His android nature and his relationship with her add layers to the story.
In 'The Worst Witch', Mildred Hubble is the main character. She's the one who is always getting into trouble at the witch school. In 'Room on the Broom', the witch herself is the main character, along with her cat, dog, bird and frog friends that she picks up on her journey.
The main character is of course the friendly witch herself. There might also be some villagers, like the village elder who might interact with the witch, and perhaps some children who are curious about the witch and her magic.
The main character is of course the old witch herself. And often there's a young person, like a child or a young adult, who gets involved with the witch, either by accident or on purpose.