The plot also matters. It could be a story that explores what would happen if the brothers rebelled against their father earlier. Or it could be a story set in an alternate universe where they have different abilities or goals. A good plot keeps the readers hooked. For instance, a plot where the brothers have to team up to save their mother from an unknown enemy would be really exciting.
One great Vinsmoke Brothers fanfiction is 'The Vinsmoke Legacy'. It delves deep into the backstories of the brothers, exploring their relationships with their father and each other in a really interesting way. It has some amazing character development that stays true to the original series.
Luffy would be furious. He'd immediately set out to rescue Sanji without a second thought. He'd probably charge straight at Doflamingo's stronghold without a proper plan at first, just driven by his anger and determination to get his crewmate back.
Well, Spy x Family fanfiction can be really interesting. Some fanfictions might explore different relationships between the characters in more depth. For example, they could focus on the bond between Anya and Loid in a new situation that wasn't shown in the original manga or anime. It's also fun to see how authors play with the spy and assassin themes in unique ways.
For Nami, her intelligence and cunning are key. She could use her smarts to get Sanji out of trouble in the fanfiction. Also, her love for money and treasure can add an interesting dynamic. For example, she might convince Sanji to go on a dangerous adventure in search of a valuable item, promising him new ingredients for his kitchen.
Some people may feel extremely frightened. The disturbing nature of these stories can create a sense of dread and unease. They might have trouble sleeping or find themselves constantly thinking about the horrors described in those stories.
It can be developed through shared hobbies in the modern world. For instance, if they both like extreme sports, they could bond over skydiving or surfing. This would not only bring them closer but also show a different side of their characters.