Well, a frequent theme in 'older Naruto Anbu' fanfictions is the exploration of Naruto's past traumas and how they affect his Anbu work. For example, his experiences as an outcast in the village might influence how he views his role as a protector. Also, the theme of redemption can be seen in some of these fanfictions. Naruto may be trying to make up for past mistakes or the wrongs done to him. Additionally, the theme of power and how Naruto uses his new - found Anbu skills is also common.
One common theme is secrecy. Since the Anbu are a secret organization, the fanfictions often revolve around Naruto having to keep his Anbu life a secret from his friends. Another theme is intense training. As an Anbu, Naruto has to be highly skilled, so his training in these fanfictions is usually very tough and extreme.
One common theme is power and its control. Since there's a dragon element, often the characters are dealing with new and powerful abilities that come from the dragon connection. They have to learn to control it, like in 'The Dragon of the Anbu' where the main character struggles to master his dragon - like power at first.
One common theme is growth. Since Naruto is a kid in these fanfictions, it often focuses on how he grows both as a ninja and as a person in the Anbu. Another theme is friendship. Even in the strict and secretive Anbu, Naruto forms strong bonds with his comrades.
One great 'older Naruto Anbu' fanfiction is 'The Anbu's Redemption'. It focuses on Naruto's experiences as an Anbu member later in life and how he overcomes various challenges. Another is 'Naruto: Anbu Ascendant' which delves into his growth within the Anbu ranks and his relationships with other Anbu members.
One common theme is secrecy. Since they are in the Anbu, their relationship has to be hidden from others. Another theme is the growth of both characters. Naruto is constantly evolving, and Yugao also has her own character arc. And of course, there's the theme of loyalty, both to the village and to each other within the context of their relationship.
Well, a frequent theme is the exploration of different cultures. The ninja culture from Naruto and the devil, angel, and other supernatural cultures in DxD collide. Writers often use this to create interesting stories. Also, redemption can be a theme. Maybe a character from DxD who was on the wrong path gets influenced by Naruto's positive attitude and tries to change for the better. And of course, there's always the theme of adventure as Naruto navigates this new and strange world.
One common theme could be redemption. Maybe Naruto helps Mikoto with something from her past. Another could be adventure, where they go on quests together. And sometimes, it's about love against all odds, as their relationship might be seen as unconventional in the Naruto universe.
One main theme is secrecy. Since Root ANBU operates in the shadows, the fanfictions often focus on Naruto having to keep his actions and identity within Root a secret from his friends and the rest of the village. For example, in many stories, he has to lie about his missions or where he's been.
One common theme is secrecy. The Anbu are all about secrecy, and many fanfics play around with how Naruto has to keep his identity or certain missions a secret. For example, he might be on a mission where revealing his face or name could be disastrous.
The theme of legacy is also possible. Sasuke comes from a powerful clan, and he can pass on some of that heritage to Naruto. Naruto, on the other hand, has his own unique power and will. Their combination of legacies can create an interesting story. For example, Sasuke might teach Naruto about the Uchiha clan's fire - style jutsu, and Naruto could incorporate it into his own fighting style.