Well, in 'perospero older brother oc fanfic', a frequent theme is the exploration of his character growth. As an older brother, he may face challenges that force him to become a better person or a stronger leader. Also, themes of sacrifice might be present. He might have to sacrifice his own desires or safety for the sake of his family or the original character in the story. There could also be themes related to the clash between different ideologies within the Big Mom Pirates crew, which he is a part of.
One common theme could be family loyalty. Since Perospero is an older brother, stories might explore how he protects and guides his younger siblings in the context of an original character's story. Another theme could be power dynamics, especially considering Perospero's abilities in the One Piece world.
Common themes in 'perospero older brother oc fanfic' often revolve around his role within the family structure. In many cases, the fic might focus on his relationship with his mother, Big Mom, and how that affects his interactions with his siblings. Additionally, themes of redemption could be present. Maybe he has made mistakes in the past, and through his relationship with the original character, he tries to make amends. Another theme could be the discovery of new powers or abilities, either for himself or for the original character, and how that changes the power balance within the story.
I'm not sure of a specific 'perospero older brother oc fanfic' off the top of my head. You could try searching on fanfiction websites like Archive of Our Own. They have a large collection of One Piece - related fanfics which might include what you're looking for.
One common theme is protection. The OC older brother is often shown protecting Naruto from harm, whether it's from the villagers' hatred or from dangerous enemies. Another theme is mentorship. The older brother usually imparts his knowledge of ninjutsu and life lessons to Naruto.
Responsibility is a common theme. As an older brother, Naruto has to take care of others. Another theme is protection. He needs to protect his siblings from various threats in the Naruto world.
In 'older brother naruto fanfic', a prevalent theme is family bonds. It shows how the presence of an older brother can strengthen Naruto's sense of family, which he lacked growing up. This often leads to Naruto becoming more confident and having a better understanding of his place in the world. Also, the theme of self - discovery is common. Through his interactions with his older brother, Naruto discovers new aspects of himself, his powers, and his potential. It's like the older brother acts as a catalyst for Naruto's personal growth. Additionally, themes of loyalty and sacrifice are also seen, as the older brother is willing to do anything for Naruto.
One common theme is protection. The older brother is often depicted as protecting Naruto from various threats. Another theme is mentorship, where the older brother guides Naruto in his ninja training.
One common theme is loyalty. The older brother is always loyal to Harry and will do anything to protect him. Another theme is family love. Despite the difficult situations they are in, the bond between the brothers is strong.
One common theme is protection. The older brother often takes on the role of protecting Sakura from various threats or hardships. Another theme could be family bonds, exploring the unique relationship between an older brother and Sakura.
One common theme is family. Since it's about Luffy's brother OC, family bonds are often explored. The OC may have a different upbringing but still shares a deep connection with Luffy. Another theme is loyalty. The OC usually ends up being loyal to Luffy and his crew, just like the other Straw Hats.
The theme of redemption also shows up a lot. Maybe the older brother has made some mistakes in the past, and the fanfiction focuses on his journey to redeem himself. And how Sirius plays a part in that, whether he helps or hinders the process. It's a great way to explore the characters' depths and their relationship further.
Another theme is the discovery of self - through the relationship with the older brother. In 'plans to love older brother' novels, the main character often grows and learns about themselves as they interact with their older brother. They might realize their own strengths and weaknesses in comparison to their older brother. This self - discovery is often intertwined with their love for the older brother.