Yami was born in the Clover Kingdom. He had a difficult upbringing. He was from a place where magic was not as refined as in other parts of the kingdom. Yami was different from the start. He had a rough and tough exterior which was also reflected in his magic. His dark - type magic was not always well - received in the kingdom that favored more 'noble' types of magic. But he was determined and through his own strength and will, he rose to become a captain in the Black Bulls.
The key elements in Yami's origin story include his humble beginnings in the Clover Kingdom. His magic, which was different from the mainstream magic in the kingdom, was a big part of his story. It led to him facing discrimination but also made him work harder. His leadership potential, which was probably developed through his struggle to be accepted, is also a key element. And his journey from an outcast to a respected captain in the Black Bulls.
In some yami and seto fanfictions, Yami might be depicted as the more mysterious and powerful one. Seto, on the other hand, is often shown as the proud and wealthy character. Their interactions can range from intense rivalries to unexpected alliances or even romantic undertones. However, in lemon fanfictions, these characteristics can sometimes be exaggerated for the sake of the plot.
Asta's leadership style would likely be more energetic and hands - on compared to Yami's. Yami is more laid - back in a way. Asta would probably be running around, getting involved in every aspect of a mission. He'd be the first to jump into battle, leading by example. While Yami gives orders from a more strategic distance.
Another interesting concept could be a crossover fanfiction. Picture a situation where Luffy from One Piece, who has the Yami Yami no Mi in his world, somehow ends up in the Naruto world. This could lead to all sorts of chaos and interesting interactions as the two different power systems collide.
To create a unique Naruto Yami Yami no Mi fanfiction, start by thinking outside the box. Don't just copy the typical uses of the Yami Yami no Mi from One Piece. Instead, adapt it to fit the Naruto world. For instance, instead of just absorbing physical things like in One Piece, the power could be used to absorb ninjutsu and turn it into something else.
One of his friends could be the cause, accidentally. Maybe a friend makes a deal with a shady character without realizing the consequences. This deal ends up putting everyone in danger, and Yami gets mad at his friend's naivete and the mess they've created.
One plot idea could be Yami going on a solo mission to a mysterious and dangerous land. He has to face powerful new enemies and discover secrets about his own past. Another could be Yami training a young and inexperienced magic knight, sharing his unique combat and magic knowledge.
Yami remains alive in the manga. The author chose to keep Yami as an ongoing character to drive the story forward and interact with other characters in various scenarios.