One common theme is brotherly love. Sabo's strong bond with Ace drives him to take on the dangerous mission of saving him. It shows how far one would go for family.
A theme of sacrifice also exists. Sabo may have to sacrifice his own safety, his relationships with others, or even his own goals to save Ace. It shows the selfless nature of true friendship and brotherhood.
Friendship is a very common theme. Their bond as brothers - in - arms is often explored in great detail. Writers like to show how they support each other through thick and thin.
One common theme is their brotherly bond. Writers often explore how their relationship grew and how it affects their adventures. For example, a fanfiction might show how they support each other during tough battles.
Rediscovery of their relationship after separation can be a theme as well. Given their backstories in One Piece where they were separated at times, in the fanfictions, their reunion can be the starting point of a new, more romantic relationship.
Typically, themes of deep emotional connection are common. Since they are characters with a strong bond in the original work, in fanfiction, this bond is often explored more deeply, even in a romantic or sexual context in 'lemon' fanfiction.
Friendship is a very common theme. Their deep bond as brothers - in - arms is often explored, like how they trust each other completely. For example, in many fanfics, they'll be in a tough situation and their unwavering faith in each other gets them through.
One common theme is brotherhood. Since they are like brothers in the original story, fanfics often explore and strengthen this bond. Another theme is adventure. They are all adventurous characters, so fanfics usually involve them going on exciting quests.
A common theme is family. Since they consider each other as brothers, the fanfictions often revolve around the idea of family loyalty, protecting one another, and the bond that holds them together. For instance, they might go to great lengths to save a brother in danger.
There's a fanfiction titled 'Sabo's Redemption: Saving Ace' which delves deep into Sabo's guilt over not being there before and his determination to make things right this time. It has a really well - written plot with some great character development for Sabo.
A third common theme is justice. Sabo is a character who fights for what he believes is right. In fanfiction, this can be shown in different ways, such as him standing up against an unjust regime or helping the oppressed. It reflects his values from the original story and is often used to drive the plot forward in an engaging way.
In fanfiction, a recurring storyline is the Marines' attempts to undermine the brotherly bond of Luffy, Ace, and Sabo. They might try to spread false rumors or create misunderstandings between them. Another popular one is the story of a Marine defector who joins Luffy's crew after realizing the corruption within the Marine ranks. Also, there are stories that focus on the power - up of Luffy, Ace, and Sabo in relation to the Marines. For example, they might gain new abilities and then use them to outwit the Marines in a big battle. There could also be fanfictions that explore the emotional side of the Marines, like a Marine who feels guilty for having to fight against the brothers because he secretly admires their loyalty to each other.