Friendship - to - love is also a common theme. The reader and Rodrick might start as friends or acquaintances and then gradually develop deeper feelings for each other. Also, family dynamics can play a role. For example, how Rodrick's family reacts to his relationship with the reader can be part of the story. Sometimes, there are themes of overcoming insecurities. Both characters might have their own insecurities that they have to face as their relationship progresses.
One common theme is self - discovery. Through their relationship with Rodrick, the reader often discovers new aspects of themselves. Another theme is friendship turning into something more. They start as friends or at least friendly acquaintances and then develop deeper feelings. Also, rebellion is a theme. Rodrick is a bit of a rebel, and the reader may get caught up in his world of rule - breaking, which can be both exciting and a source of conflict.
In Rodrick Heffley x reader fanfiction, the relationship often starts with some sort of encounter. Maybe the reader character bumps into Rodrick at school or a local event. At first, Rodrick might be his typical aloof self. But as the story progresses, he could start to notice the unique qualities of the reader. For example, the reader might be into the same music as him, which could be a major bonding point. The relationship then gradually builds, with shared secrets, inside jokes, and moments of vulnerability.
One great 'Rodrick x Reader fanfiction' is 'Rodrick's Secret Admirer'. It has a really cute plot where the reader is secretly crushing on Rodrick and there are lots of sweet interactions. Another is 'Rodrick and the New Neighbor' which shows how their relationship develops in an interesting way.
In this type of fanfiction, the character development of Rodrick within the context of the relationship with the OC is important. Maybe the OC brings out a different side of Rodrick, like a more sensitive or responsible side. It could also show how Rodrick's normal antics, such as his band activities or his relationship with his family, are affected by the presence of the OC.
One idea could be that the reader is a new student at school and Rodrick takes an immediate interest in them because they seem different from everyone else. He might start leaving little notes in their locker as a way to communicate secretly.
In the fanfiction, their relationship might start with Rodrick teasing Greg as usual. But then, an event like Greg getting into trouble at school and Rodrick being the only one who can help him out changes things. Rodrick realizes he has a responsibility towards his younger brother. This makes Greg see Rodrick in a new light, and they start to become closer.
For Rodrick, show his insecurities more. Underneath his tough exterior, he might be worried about not being good enough, especially compared to his more successful brother. For the reader character, give them normal, everyday problems like trying to fit in at school or dealing with family issues.
There may also be themes related to personal growth. Through their relationship, both Rodrick and Greg could grow as individuals. Greg might become more confident, while Rodrick could become more understanding. These fanfictions can use their relationship as a catalyst for character development.
Some Tumblr blogs are dedicated to Diary of a Wimpy Kid fanfiction, including Greg x Rodrick. You can search for relevant tags on Tumblr and might discover some unique and interesting fan - created stories that you won't find on the bigger fanfiction platforms.