Jiraiya could be important. He was Naruto's mentor and knew Naruto's father well. He might have some stories about Naruto's parents that could add more depth to the meeting. Maybe he could be there to witness the encounter between Naruto and his mom and share his insights.
The Nine - Tailed Fox could be significant. It has a deep connection to Naruto and his family. It might react in some way to Naruto's meeting with his mom. Maybe it could share some memories or knowledge that it has about Naruto's mother that Naruto didn't know before.
Minato would be an obvious choice as he was her husband. Jiraiya could also be included as he was Minato's teacher and might have had some interactions with her. Kakashi, being an important figure in Naruto's life, could have some connection to her in the past as well.
In such a fanfiction, Naruto might finally get to know his mother's personality. He could learn about her hopes and dreams, and perhaps she would share some family secrets with him. For example, she might tell him about the Uzumaki clan's special abilities that he hadn't known before.
Grover could be a popular character. Since he's Percy's best friend, he might be involved in the fanfiction, perhaps helping Percy protect his mom or going on adventures with them. Another could be Annabeth. Her intelligence and skills could be useful in the stories, like when they are facing a difficult situation and she comes up with a clever plan.
The main characters are obviously Naruto, his mom Kushina, and his dad Minato. Naruto is the protagonist of the Naruto series, and in this fanfiction, his parents play important roles in his life, whether it's through memories, time - traveling encounters, or spiritual visitations.
Iruka could play a role. He was Naruto's first teacher who believed in him. He might have some small piece of information that starts Naruto on his journey to find his parents. Then there's Tsunade. As the Hokage, she has access to a lot of secret files. She could either be an obstacle, not wanting Naruto to dig too deep, or she could be a helper, providing him with crucial information. And of course, the Nine - Tailed Fox. It was sealed inside Naruto by his father, so it might have some memories or knowledge related to Naruto's parents that it could share with Naruto.
His friends from the guild could be important. For example, Happy might be there to share in the joy of Natsu meeting his mother. Happy could also provide some comical relief during the emotional encounter.
In some fanfictions, Naruto might use a powerful jutsu he discovers or masters. For example, he could find a forbidden jutsu that has the power to bring the dead back to life. Maybe it's a jutsu that requires a great sacrifice on his part, like giving up some of his own chakra permanently.
In some fanfictions, Naruto might find his mom through a special jutsu. For example, he could discover a hidden scroll that reveals a time - traveling jutsu. Using this jutsu, he travels back to the time when his mom was alive and meets her. Another possibility is that some powerful entity guides him to a secret dimension where his mom is trapped.
One possible plot could be Naruto getting to spend a day with his mom and dad in a special genjutsu - created realm. They could teach him new jutsu and share family stories he never knew.
Obviously, Keith and his mom are the main characters.