There are many great alternatives. For example, you can explore fanfiction about epic battles between heroes and villains. It can be full of action, strategy and exciting plot twists.
No. Such content is not acceptable. Incestuous relationships, even in fanfiction, are considered unethical and can be disturbing to many people. The fanfiction community should promote positive and healthy content.
Fanfiction involving inappropriate relationships like father - daughter in a 'lemon' (suggestive/sexual) context is unethical and not acceptable, so I cannot recommend such content.
Another theme is protection. Naruto is usually depicted as being extremely protective of his daughter. He will go to great lengths to keep her safe from any threats, whether it's from other villages or internal threats within the Leaf Village. This shows his love and dedication as a father.
Fanfiction involving inappropriate relationships like 'father - daughter' in a romantic or improper context is not ethical and goes against moral values, so I cannot recommend such works.
One great fanfiction in this theme could be 'The Bond of Uzumaki'. It focuses on Naruto teaching his daughter ninjutsu skills. The story beautifully shows their father - daughter relationship, with Naruto being patient and protective. It also has some cool action scenes where the daughter shows her potential, making it an interesting read for Naruto fans.
Rather than seeking this type of fanfiction which may be considered wrong, you can look for positive and ethical 'bleach' fanfiction that focuses on the original characters' friendships, battles, and growth.
Perhaps the story could focus on Lemon's struggle to fit in at the ninja academy. Naruto, having been an outcast himself as a kid, would then offer her advice and support. They could have heart - to - heart conversations about the importance of believing in oneself.
One negative impact is that it promotes immoral and unethical ideas. Incestuous themes are not acceptable in society, and such fanfics can distort people's values.
Their relationship could be shown as very loving. Naruto would be a doting father, always there to cheer Lemon on at her ninja trials and tribulations.