One common theme is identity struggle. Naruto has to constantly be on guard about not revealing his true self while pretending to be a boy. Another theme could be friendship. He makes new friends while in his pretend identity and has to balance the truth with the relationships.
One such fanfiction could be 'Naruto's Masquerade'. In it, Naruto has to pretend to be a boy for a specific mission in a hidden village. He faces various challenges like hiding his true identity from new friends he makes during the mission.
It could start with Naruto having a strong reason to pretend to be a boy. Maybe for safety reasons in a world where being a girl could make her a target. So she decides to cut her hair short, change her clothing style, and start acting like a boy right from the get - go.
Another scenario could be that Naruto pretends to be a girl to get closer to a reclusive female ninja who only trusts other women. He disguises himself to befriend her and uncover the reason for her isolation. Along the way, he has to keep up the act, which includes having to deal with unwanted male attention that he didn't anticipate.
She might face challenges like hiding her physical differences. For example, her body structure might be different from a boy's, so she has to be careful about things like clothing choices. Also, in a world where ninja skills are often gender - associated, she may have to prove herself more in male - dominated areas of training.
In a fanfiction, Naruto could pretend to be a girl to surprise his friends. He might do it as a prank during a festival in the village. He would put on a girl's outfit, with a long wig and a pretty dress. His friends' reactions would be hilarious. Sasuke might be initially confused, while Kakashi would probably see through the disguise right away but play along for fun.
The boy could become a symbol of hope or change. His story of survival and struggle in the war could inspire others in the Naruto universe. He could be like a new light in the dark times of war, and his presence could start movements or inspire characters to work towards a more peaceful future, much like how Naruto himself is often a symbol of hope.
Yes, in some fanfictions Naruto can be depicted as a mama's boy. Writers might explore this aspect to show his softer side or to create different character dynamics. For example, they could write about how he still holds onto memories of his mother and is influenced by her values even though she's not around. This can add depth to his character and make his actions in the story more nuanced.
It could be about Naruto disguising himself for various reasons, like to infiltrate an enemy base or to play a prank on his friends. Maybe he uses some new jutsu to change his appearance completely.
One common theme is identity. Naruto has to constantly remember who he really is while maintaining the boy - disguise. Another theme is friendship. He forms new relationships while disguised, and these relationships are often tested when his true identity is at risk of being revealed.