The angel bloodline might be neglected in the fanfiction due to the lack of connection to the existing Naruto lore. In the Naruto world, there are already established power systems and lineages. If the angel bloodline is not carefully tied to these existing elements, it may be pushed to the side. Additionally, the writer might be saving it for a big reveal later in the story, so it appears neglected in the early parts.
Another possible ability could be purification. The angel bloodline might be able to purify corrupted chakra or evil spirits. In the Naruto universe, there are many instances of dark forces and cursed chakra. A character with this bloodline could be the key to cleansing such malevolent entities. For example, they could purify a village that has been infected by a dark curse or a powerful demon's influence.
I'm sure there are. Fanfiction writers are known for their creativity when it comes to popular series like Naruto. If Naruto has an angel bloodline in a fanfiction, it could mean that his physical appearance might change slightly to have more angelic features. His combat style could also be affected, perhaps incorporating more grace and using abilities related to light or purification. And it would be interesting to see how the ninja world reacts to a being with an angel bloodline in their midst, as it goes against the traditional ninja clans and their known bloodlines.
He could have the power of flight. It's a common ability associated with angels, and it would give Naruto a huge advantage in battles and also in getting around quickly.
There are also fanfictions where a bloodline is created through some sort of experimental jutsu. For example, a bloodline that allows the user to transform into different elements at will. This would give the character an edge in combat as they could adapt to any situation by changing their form.
One common theme is the struggle for acceptance. Since having an angel wings bloodline is quite different from the normal ninja abilities in Naruto. The characters often have to face prejudice or misunderstanding from others.
In some fanfictions, one of the bloodline limits could be something like a super-enhanced Sharingan-like ability. Another might be a power related to controlling natural elements in a unique way, for example, a more powerful form of water control. And perhaps a bloodline limit that gives Naruto the ability to instantly teleport short distances. However, different fanfictions can have very different interpretations of these six bloodline limits.
With Sakura, Naruto might become more of a protector figure. His angel bloodline could give him enhanced strength and speed, making him better able to shield Sakura from danger. And Sakura might see Naruto in a new light, perhaps with a bit of awe due to his angel - like abilities.
A possible plotline is the discovery of an ancient prophecy related to the fallen angel bloodline in the Naruto universe. This could lead to a race among different factions to either protect or use the power of the character with this bloodline. The character might have to fight against those who want to exploit their power for evil purposes while also struggling with their own identity.
Well, one possible ability could be the power of flight. Just like traditional angels, those with the Black Angel Bloodline might be able to soar through the skies of the Naruto world. Another ability could be some sort of dark energy manipulation. They could use this dark energy for offensive purposes, like shooting out dark projectiles. Also, they might have enhanced senses, which would be useful for detecting enemies or finding hidden objects in the ninja world.