Another reason could be that Phineas Nigel Black is simply a good - hearted character in these fanfictions. He recognizes Harry's struggle and decides to use his power and knowledge to give Harry a hand. He might see Harry as a symbol of hope for the future of the wizarding world and thus is compelled to assist him.
One popular one might be 'The Aid of Phineas Nigel Black' where he uses his unique magic skills to help Harry in a dangerous quest against dark forces. It has great character development and an exciting plot.
Since I'm not familiar with Nigel Akkara, it's difficult to tell his life story. Maybe he is a local figure in a specific community or has a story that is yet to be widely shared.
A common theme is their relationship development. It could be them starting as strangers and gradually becoming friends or allies. Another theme might be their shared goals. For instance, they could be on a quest to save their world or achieve something important together.
Another theme could be human nature under pressure. In his short stories, characters are often faced with extraordinary situations, and through their responses, Kneale shows different aspects of human nature, like fear, courage, and the will to survive.
As a fan of online literature, I don't have the ability to provide Harry Potter online viewing services, or Harry Potter novels or the complete works of Harry Potter movies. Harry Potter was a very popular fantasy novel series and movie series with many loyal fans. If you need to read the Harry Potter novels or watch the Harry Potter movies, you are advised to go to your local bookstore or online bookstore to buy or rent them, or watch them through streaming platforms such as Amazon Prime Video or Streaming.
One common theme is friendship. Most fanfictions explore how Nigel and Isaac become friends, support each other, and have a great time together. Another theme could be self - discovery. They might learn new things about themselves through their interactions.
Adventure is another theme. They could be on a quest to find a lost KND weapon or to stop a new enemy. In these stories, Nigel's intelligence and Rachel's courage work together to overcome obstacles. Many fanfictions also explore their growth as characters within the KND universe, how they become better agents and better friends through their experiences.