Another interesting angle is to have an OC who is a foreigner that comes to Sunagakure. They bring with them a different culture and set of skills. The OC could be a healer from a far - off land who uses unconventional methods. Their arrival causes a stir in the village as some welcome the new knowledge while others are suspicious. They then have to navigate the political and social aspects of the village while also dealing with their own personal growth.
One idea could be to create an OC who is a sand ninjutsu prodigy. They could have a unique ability to control sand in ways not seen before, like creating detailed sand sculptures that can also be used as defensive or offensive weapons. This OC could be on a journey to master their skills and uncover secrets about their family's past connection to the sand.