Well, Naruto could learn more about empathy. By being in Inari's form, he experiences life from Inari's perspective. This might make him more sensitive to the feelings of others who are not as confident or strong as he is.
One idea could be that Naruto uses his henge to transform into Inari to teach the real Inari a lesson about self - confidence. He could go through a day in Inari's life, facing the same challenges Inari does, but handling them in a more positive way, inspiring the real Inari to change.
One possible fanfiction idea could be Naruto using his henge technique to transform into someone wearing a really cool swimsuit. Maybe he does it for a mission at a beach resort where he has to blend in with the tourists. He could transform into a famous surfer and use his skills to gather information.
A mentor - mentee relationship could develop. Naruto has a lot of experience and skills, and Inari is young and eager to learn. Naruto could guide Inari in his ninja journey.
One possible fanfiction could be that Naruto henge into a swimsuit as a prank. He might transform into a ridiculous swimsuit -covered version of himself to make his friends laugh. For example, he could turn into a swimsuit with a huge fish pattern all over it and start acting like a goofy mermaid in front of Sasuke and Sakura, just to break the tense mood during a training session.
Most likely not. The combination of 'panties' in the title gives the impression that it could involve inappropriate or at least very juvenile and not - so - family - friendly content. Naruto is a popular franchise that is enjoyed by a wide range of ages, and such a fanfiction concept seems to deviate from the more positive and acceptable themes usually associated with the series.
Yes, there could be such fanfictions in the Naruto fanfiction universe. Writers often come up with creative ideas like this to explore different relationships and storylines that deviate from the original canon. It can be an interesting concept as Naruto's character traits like his determination and kindness could have a great impact on Inari's growth and development if he were his father.
One common theme is growth. Inari often starts as a weak or uncertain character and grows into a more capable and confident person. Another theme is friendship, especially his relationship with Naruto which is often explored deeply.
He might also get help from his friends. For instance, Sasuke could sense that something is wrong with Naruto. With his Sharingan, Sasuke might be able to see through the henge and then use his own powers to help Naruto break free. Or Sakura could use her medical ninjutsu knowledge to somehow counter the effects of the henge on Naruto.