In this fanfiction concept, Naruto being half - angel could bring in a whole new set of moral dilemmas. Since angels are often associated with a strict moral code, Naruto would have to grapple with this. For example, the ninja world has a lot of gray areas in terms of morality. Assassinations and spying are part of a ninja's job, but would an angel - half Naruto be okay with that? Also, his angel side might attract the attention of other supernatural or religious entities in the fanfiction world. This could lead to both positive and negative interactions, like making new allies who are also of angelic or divine nature, or being targeted by dark forces who want to either corrupt him or use his powers for evil.
Well, if Naruto is half - angel in fanfiction, it might change his relationship with the other characters. His friends might view him with a bit of awe or even fear at first. His enemies, on the other hand, might be more cautious. Naruto himself would probably struggle with his new identity. He's always been a ninja, but now he has this angelic side. He might question his place in the ninja world and whether he should use his angel powers for the good of the village or in a more general, 'angelic' sense.
One implication could be that Naruto has enhanced physical abilities. Angels are often depicted as strong and fast, so Naruto might have superhuman strength and speed. He could also have some sort of divine power, like the ability to heal or purify things. Another aspect could be his appearance. Maybe he has wings or a halo that he can hide or show at will.