Friendship is a major theme. The stories often focus on how Cedric and Harry's brothers build a bond that overcomes differences. For example, in some fictions, they start as rivals but end up as friends.
Sure. One popular Cedric Harry Brothers fanfiction is 'The Unlikely Bond'. It explores a unique friendship between Cedric and Harry's brothers in a very heartwarming way.
Well, Harry is often depicted as more impulsive. His past experiences with Voldemort have made him quick to act when he senses danger. For example, he might jump into a situation to protect others without thinking twice. Cedric, on the other hand, is more cautious. He thinks things through, like when he approaches the Triwizard tasks. He carefully plans his moves.
One interesting plot could be them growing up together in a magical world. They discover a hidden part of Hogwarts that has been forgotten for centuries. They use their combined skills, Harry's courage and Cedric's intelligence, to solve the mysteries within it.
Well, in some fanfictions, Cedric might use his magical skills to shield Harry from physical attacks. For example, he could cast protective spells like Protego Maxima to create a strong shield around Harry when they are in danger. Maybe in a situation where dark wizards are attacking, Cedric steps in front of Harry and uses his wand to fend off the spells aimed at Harry.
One great example could be a story where Cedric and Harry, as brothers, face the challenges of Hogwarts together. They might study for exams, deal with bullies like Draco Malfoy, and support each other during Quidditch matches. In such a fanfic, their brotherly bond could be shown through little things like Cedric helping Harry with a difficult spell or Harry standing up for Cedric when others question his abilities. It could also explore how their different personalities - Cedric's more calm and collected nature and Harry's impulsive heroism - complement each other in their adventures at Hogwarts.
A fanfic with Cedric and Harry as brothers would change the Hogwarts experience for both of them. They could share a dormitory or have special family - related privileges at school. Their bond as brothers would likely make them more of a united front against the likes of Voldemort. Instead of Harry being the sole focus of Voldemort's attention, Cedric would also be in the crosshairs. This would lead to different strategies and plot developments. The Weasley family might interact with them differently too, as they would be related to Harry in a different way. And the relationship between Harry and Cho Chang (who was Cedric's girlfriend) would be completely reimagined, adding a whole new layer of complexity to the story.
One common theme is friendship. Since they were both Hogwarts students, many fanfictions explore how they could have been better friends. Another theme is rivalry turned into respect. Given their initial competition in the Triwizard Tournament, a lot of stories show how they grew to respect each other. Also, the theme of sacrifice often comes up, especially related to Cedric's death and how it affected Harry.