Main characters in 'harry intelligence sheep fanfiction' are often Harry and the sheep. However, depending on the plot, other magical creatures or characters could also play important roles. For example, if the story is set in Hogwarts, professors like Dumbledore might notice the strange relationship between Harry and the sheep and offer their wisdom or assistance, either to help them or to keep the school's order.
Perhaps in a 'harry intelligence sheep fanfiction', the intelligent sheep comes from a magical realm of its own. It has knowledge of ancient spells and magic that Harry has never heard of. The sheep becomes Harry's guide in exploring new forms of magic, and they work together to bring a new era of peace and understanding between different magical creatures in the wizarding world.
One possible fanfiction could be about the adventures of Harry Intelligence as he leads his sheep followers on a quest to discover a hidden magical pasture. Maybe they encounter various obstacles along the way, like a mischievous sprite trying to mislead them.
You should also consider the setting. Will it be in a traditional rural pasture setting, or a more fantastical world? If it's a fantastical world, describe the magical elements. For example, there could be floating grass that only the sheep followers can eat to gain special powers. Once you have these elements in place, start writing the first chapter, introducing the characters, the setting, and the initial problem they face.
One possibility could be an OC who is a shepherd of the intelligence sheep. This OC could have unique jutsu related to mind - control or knowledge - gathering, which they use to lead their sheep followers. The sheep could be like manifestations of hidden knowledge in the Naruto world.
The OC could be found as a child by the intelligence sheep. Maybe the OC was lost in a forest and the sheep, sensing the OC's potential, took them in. As the OC grew up among the sheep, they learned the ways of the Naruto world from the sheep's collective intelligence. This experience could shape the OC's values and abilities, for example, giving them an uncanny ability to read people's intentions, similar to how sheep can sense danger in the wild.
He might pretend to not understand complex concepts. For example, when others are discussing advanced magic theories, he could act confused even though he actually gets it.
He may also choose to stay quiet during discussions where his knowledge could shine through. Instead of speaking up and showing off his intelligence, he lets others do the talking and only chimes in when it's necessary or when he can play dumb and ask simple questions.
One reason could be that he wants to avoid unwanted attention. In the fanfiction world, being overly intelligent might make him a target. Another reason might be that he is trying to fit in with a certain group that values other traits more. For example, if he's in a group that values physical strength over intelligence, he may hide his smarts to seem more like them.
In the story, the color is the main difference, of course. But perhaps their behavior could also be different. The white sheep might follow the norm more closely, while the black sheep, due to its distinctiveness, might be more likely to explore on its own or act in a way that is not so traditional for the flock. However, it really depends on how the story is told. Sometimes the story just focuses on the visual difference of their colors.