One possible plot could be that Mirabel discovers her ability to see ghosts after the events of Encanto. The ghosts could be the ancestors of the family who have unfinished business. For example, they might want to pass on a long - forgotten family secret to Mirabel that could help the family in some way.
Another place to check is Wattpad. It has a large collection of fanfictions. Some authors might have explored the concept of Mirabel seeing ghosts in their own unique ways. Browse through the Encanto - related fanfictions on there.
One important ghost could be the previous Hokages. They have a lot of knowledge and wisdom about the village and its secrets. Naruto seeing them could be a way for him to get some really valuable advice on how to deal with the current threats to the village, like a new powerful enemy or internal political issues.
It could affect the plot by making Naruto more cautious. Since he can see ghosts, he might be constantly on edge, not knowing if a new ghost is a friendly one or a threat. This could lead to him making different decisions in battles or in his interactions with other characters. He might also try to avoid certain places where there are a lot of ghosts, which could change the course of his adventures.
Perhaps she tries to understand Abuela's perspective. Mirabel is a kind - hearted girl, and she may think that there is a reason behind Abuela's actions. So she might try to see things from Abuela's point of view while still feeling the pain of the punishment.
Mirabel might be initially shocked and heartbroken. She loves her family and the village, so being banished would be a huge blow. She could cry and try to plead with Abuela to change her mind.
She might be heartbroken at first. After all, being kicked out by her own abuela is a big blow. But then she could become determined to prove herself. So she might set out to find a way to show that she is an important part of the family even without a magical gift.
It could be her mother. Mothers are often the ones who enforce discipline in the family. Her mother might feel disappointed in Mirabel for lying and give her a punishment to teach her a lesson.
She might lose the trust of her family members. In the Encanto family, trust is crucial. If Mirabel lies and is found out, her family may start to question her honesty in the future.
The Black and White Impermanence didn't really exist. They were just a pair of gods in Han folk culture, characters in myths and legends. Therefore, no one could see the Black and White Ghosts because they only existed in legends.