Boruto is often a popular character. Since he's Naruto's son, he has a natural connection to Naruto's daughter in these fanfictions. They might go on adventures together or have some sibling - like rivalries.
Well, Boruto could be an interesting character. As her older brother, he could be a mentor figure to her, teaching her some of the more advanced ninja techniques he's learned. He could also be protective of her and get into trouble when he tries to defend her honor. Another character could be Sarada. She and Naruto and Hinata's daughter could become good friends, training together and sharing secrets about their families and dreams.
Edward Cullen himself is always a popular character. Fans love to see his fatherly side in these fanfictions. He's often depicted as overprotective yet also trying to give his daughter some freedom. Bella Swan, the mother, is also popular. Her relationship with her daughter and how she imparts her human experiences to the half - vampire daughter can be an interesting aspect. Another popular character could be Jacob Black. His interactions with the Cullen family might extend to the daughter, and his werewolf nature could create some unique storylines in relation to her.
The daughter is the main attraction in this type of fanfiction. She could be shown as having a strong bond with her father Naruto, learning from his rasengan technique perhaps. Sakura is also crucial as she imparts her medical ninjutsu knowledge. And there could be other characters from the original Naruto series that play important roles, like Sasuke who might be a mentor - like figure to her in some stories, teaching her about the darker aspects of the shinobi world.
Another storyline could involve Naruto's daughter being sent on a special mission that is related to a mystery from Naruto's past. Maybe she discovers some secrets about her father's early days that were never known before. This could lead to her having to make some tough decisions about how to handle this newfound knowledge.
Zuko could be a main character. He might be the uncle figure to Azula's daughter, trying to guide her away from the dark path her mother once walked. He could share his own experiences of redemption and growth with her.
In 'naruto daughter of kami fanfiction', Naruto and his daughter are the mainstays. His daughter, with her unique identity, would be at the forefront. There could also be characters from Naruto's family, like Hinata if she is Naruto's wife in this fanfiction. And then there could be characters from the wider ninja world who are affected by or interested in the daughter's powers. Maybe some of the village elders or other powerful ninjas who want to use her powers for their own purposes or try to keep her powers in check for the safety of the village.
Another possibility could be Sakura. Although she was in love with Sasuke, in some fanfictions, the storylines can be altered. Sakura is a strong and intelligent character, and she could potentially have a daughter with Naruto in a different narrative where their relationship develops in a new way.
In some of these fanfictions, Ruby can be a popular character. She has her own history with the Winchesters and with the underworld. When a daughter of hell is introduced, Ruby's knowledge and her own motives can make for some interesting plot developments. And then there's also Rowena, a powerful witch. Her magic and her devious nature can create all sorts of trouble and alliances when combined with the presence of a daughter of hell.
Obviously Naruto as Whitebeard's daughter would be the main character. Then, there would probably be Whitebeard himself, who would play the role of her father figure. The crew members of Whitebeard's ship like Marco would also be important characters as they interact with Naruto and help her adjust to the pirate life.
Pepper Potts could be a common character. She might be in a position where she tries to mediate between Tony and his unwanted daughter, either trying to get Tony to be more accepting or helping the daughter understand Tony's perspective.