Boruto could be developed by showing his growth in responsibility. For example, in the fanfic, he could take on the task of teaching Himawari a new jutsu. This would not only show his skills but also his patience. Himawari, on the other hand, could be developed by showing her becoming more independent. Maybe she decides to go on a small mission on her own to prove herself to Boruto.
The relationship can be shown as a strong sibling bond. For example, Boruto could be protective of Himawari when she is in danger during a mission. Or Himawari could be the one to cheer Boruto up when he is feeling down about his ninja training.
Well, perhaps a plot where Boruto and Himawari accidentally swap bodies due to a strange ninja jutsu gone wrong. This leads to humorous situations as they try to adapt to each other's lives and also understand each other better. Or it could be a story where they have to work together to protect the Hidden Leaf Village from a new and unexpected threat.
Some fanfictions might explore a future where Boruto and Himawari are older and have important roles in the village. For instance, Boruto could be leading a major mission and Himawari is in charge of the village's defenses in his absence. The story could detail their responsibilities, how they handle the pressure, and how they still maintain their close connection despite their busy schedules.
The main characteristic to avoid is the inappropriate or adult - themed content. 'Lemon' in fanfiction often implies sexual content which is not suitable for all audiences. It goes against the family - friendly nature of the Boruto series which is mainly about the growth and adventures of the young ninjas.
Well, one good story could be about Himawari and Boruto going on an adventure together in a magical forest. In this fanfiction, they might face challenges that test their bond as siblings and grow stronger because of it. It could show their unique abilities working in harmony.
One idea could be a story where Boruto and Himawari discover an old lemon tree in the Hidden Leaf Village. Naruto and Hinata then tell them about a legend that the tree was planted by the first Hokage. The kids decide to take care of the tree and throughout the process, they learn more about their family's history and the importance of nature in their village.
Well, obviously Naruto and Hinata should be included. Naruto could offer some words of wisdom to Boruto and Himawari as they face different challenges. Hinata can be the nurturing mother figure who is always there for them. Another great character to include could be Sasuke. He could train Boruto and Himawari in some new ninja techniques.
One idea could be a story where Himawari and Boruto go on a secret adventure together outside the village. They encounter a strange new jutsu and have to figure out how to deal with it, relying on their unique sibling bond.
Well, obviously Naruto and Hinata should be included. Naruto as the father can give some wise advice to Boruto and Himawari. Hinata as the mother can show her love and care for them. Also, Shikadai could be a great addition. He is Boruto's friend and his calm and intelligent nature can contrast with Boruto's more impulsive side, and he can also interact with Himawari in an interesting way.