In my opinion, the characters who are on the verge of making a major change in the story are popular to write about. For example, a character who is torn between loyalty to their group and their own personal beliefs. Their internal struggle can be a great source of drama and character development in a Brothers by Blood fanfic.
Often, the main protagonist is a popular choice. Their actions and decisions drive the story forward, so it's exciting to explore their character more. Another popular character could be the antagonist. Writing about their motives and backstories can add depth to the fanfic.
Aegon Targaryen is often very popular. He's a central figure in the original lore, and in fanfics, writers can explore different aspects of his character, like his leadership and his relationships.
The main character, Poppy, is often a popular choice. Her complex personality and her journey are full of potential for fanfiction writers to explore further.
Elsa is a top choice. Writers can explore her powers more deeply, her emotions, and her role as the fifth spirit. Anna is popular too. She's the more down - to - earth character, and her love for her sister and her kingdom can be the focus of many stories. Kristoff also has his fans. His relationship with Anna and his own growth as a character can be explored in fanfic.
Seth Cohen is definitely a popular choice. His quirky personality, love for comics and his complex relationships, especially with Summer, give a lot of material for fanfic writers. Writers can explore his growth from a nerdy teen to a more mature adult.
Jack is often a popular character to write about. He's the main character, so a lot of fanfic focuses on his further adventures, like him learning new martial arts moves or facing new challenges in his personal life.
Ruby is definitely a popular choice. Her naivete and determination make her a great character to explore in different scenarios. Writers can delve into her growth as a huntress and how she copes with the increasing responsibilities. Weiss is also popular. Her complex family background and her journey from a somewhat snobbish heiress to a more empathetic teammate provide a lot of material for fanfic writers.
Phoebe is quite popular. Her complex personality and her powerful abilities make her an interesting character to write about. Also, Oscar Mike is a fan favorite. His military - like attitude and his skills in combat are appealing. Another popular one is Montana. His brute strength and his loyalty to his friends are great aspects to explore in fanfic.
Kojou Akatsuki is definitely one of the most popular. As the main character, he has a complex personality with his vampire powers and normal teenage boy traits. His relationships with other characters, especially Yukina, provide a lot of material for fanfics.
Ema Hinata is often a central character. Since she is the main female character in the original work, many fanfics tend to focus on her relationships with the brothers. Subaru Asahina is also quite popular. His passionate and sometimes brash personality can create interesting storylines in a lemon fanfic.
Antagonists can be really interesting to write about as well. By exploring their motives and backgrounds in the 'Children of the Dust Fanfic', writers can add more depth to them. Maybe there was a reason behind their actions in the original story that wasn't fully explored, and the fanfic can shed light on that. Also, they can be given a chance at redemption or further descent into villainy, which can create engaging storylines.