One type of original character often added is a love interest specifically created for Fem Naruto in the high school setting. This character could be a charming athlete or a smart student council president. Also, there could be a quirky art student who becomes Fem Naruto's friend and introduces her to a whole new world of creativity. Additionally, an over - enthusiastic teacher's assistant might be added as an original character, always getting Fem Naruto into some sort of comical school - related trouble.
Often, there's an older sibling - like figure added as an original character. This person could be protective of Fem Naruto and give her advice on high school life and relationships. Another common original character is a school janitor who is secretly very wise and gives Fem Naruto cryptic advice. And there could be a foreign exchange student who brings a different culture into the high school and becomes friends with Fem Naruto, leading to some interesting cross - cultural experiences in the fanfiction.
A character who is a master of shadow puppetry, but not in the normal sense. Instead of just creating simple shapes, they can create entire landscapes and armies of shadow creatures. This character could have a mysterious backstory and their own motives, which could either make them an ally or an enemy in the fanfiction.
One common type of original character is a rival. This rival could be another ninja who also wants to harness the power of the Kyuubi, either for good or bad reasons. They might challenge Naruto and his brother at every turn. Another could be a healer who is specifically attuned to the Kyuubi's chakra and can help Naruto when he has trouble controlling it. There could also be an old sage - like character who has been around since the time the Kyuubi was first sealed and has secrets to share.
Naruto is central, and then there are the female characters. Kiba could be in the story as Naruto's friend. Among the girls, Temari might be a transfer student who is tough and independent and gets drawn to Naruto's unique charm. Karin could be the girl with a bit of an edgy side who is fascinated by Naruto's powers. And then there's also Shizune, perhaps as a teacher who has a soft spot for Naruto and unknowingly adds to the chaos of the harem situation.
In these fanfictions, a frequent theme is adaptation. A female Naruto has to adapt to the very different world of High School DxD, which has its own rules about devils, angels, and other supernatural beings. Also, the theme of identity can be important. As she tries to fit in, she might question who she is in this new context. There may also be themes related to love and romance as she meets new and interesting characters.
You could create a character who is a descendant of an ancient clan that has a special connection to the Nine - Tails Chakra. This character could be a rival to Naruto at first, thinking that Naruto doesn't deserve the power of the Nine - Tails. Another option is a mysterious healer who can manipulate the Nine - Tails Chakra in a unique way to heal even the most severe wounds.
A new magical teacher could be added. This teacher could have a special connection to Kuroka, perhaps knowing about her past in ways others don't. They could guide her in her magical studies and also add some mystery to the story.
One common theme is self - discovery. Since Naruto is a female in these fanfics, she often has to figure out who she is in this new context of high school. Another theme is friendship. Just like in the original Naruto series, the importance of making friends and having a support system is emphasized.
One interesting type of original character is a wandering ninja who has been on a quest to find the true nature of the Nine - Tailed Fox. This character might cross paths with Naruto and share their knowledge or experiences. Another is a young girl who can communicate with the Nine - Tailed Fox on a spiritual level, which causes Naruto to be both intrigued and a bit jealous. And then there are the members of a secret organization that wants to harness the power of the Nine - Tailed Fox for their own dark purposes, and they create original characters within this organization who have unique abilities and motives.
There are original characters who are members of a secret ninja clan. They cross paths with Jiraiya and Naruto during their adventures. These characters bring in new ninja techniques and a different culture within the ninja world. Also, there could be a young orphan that Jiraiya and Naruto take in. This character could represent a new generation that they are responsible for, and it adds a new dynamic to the story of Jiraiya raising Naruto.
Well, Naruto is a must - have. The female ninja like Sakura, who is strong - willed and has a long - standing relationship with Naruto. Hinata, with her shy yet determined personality, is also very common. Ino, who has her own charm and skills. Tenten could also be a character in these fanfictions. She is often overlooked in the original series but can have a more prominent role in a harem fanfiction. And Kurenai, with her experience and mystery, can also be part of the story.