Well, for a fanfiction where an OC is heartbroken by Rosalie, you could look for ones that explore themes of unreciprocated love. Maybe the OC has deep feelings for Rosalie, but she is either oblivious or just not interested. Some fanfics might show how the OC tries to win Rosalie over but fails miserably, like in 'The Failed Courtship of OC and Rosalie'. It could also be that Rosalie is already committed to someone else, causing the OC's heartbreak as seen in 'Rosalie's Unattainable Heart'.
To write such a fanfiction, start with the build - up of the relationship. Let the OC and Rosalie interact in a way that the OC starts to develop feelings. Maybe they have a common interest or they save each other's lives. Once the feelings are there, have Rosalie do something that shatters the OC's hopes. It might be that she chooses someone else over the OC. Then, to really show the heartbreak, describe the OC's emotions in detail. How they cry themselves to sleep, how they can't focus on anything else anymore.
One great Rosalie Hale OC fanfiction is 'The Newcomer'. It has an interesting OC who shakes up the dynamics in the world of Rosalie. The OC has a unique backstory that ties in well with the Twilight universe.
One common theme is friendship. Often, the OC forms a strong bond with Rosalie. Another theme is self - discovery. The OC might be on a journey to find out who they are, and Rosalie may play a part in that.
Another factor is the writing style. A vivid and engaging writing style can make the Rosalie Hale OC fanfiction really shine. The author should be able to describe the emotions of the characters, especially Rosalie and the OC, in a way that makes the reader feel as if they are right there in the story, experiencing everything along with them.
There's a fanfiction called 'Rosalie's Redemption Arc with an OC'. In this story, the OC plays a crucial role in Rosalie's journey towards redemption. The author does a wonderful job of weaving the OC's story into the existing 'Twilight' universe. The relationship between Rosalie and the OC is complex and well - written, making it a must - read for 'Twilight' fans.
Another theme is adventure. Some fanfictions will pair Rosalie and the male OC in some sort of adventure, whether it's dealing with other supernatural beings in the Twilight universe or going on a journey outside of Forks. This allows for the development of their relationship in a more action - packed setting and shows how they rely on each other in difficult situations.
Another option is to join Twilight - related fan communities or forums. There, you can ask fellow fans if they know of any good Rosalie Hale x Male OC fanfictions. These communities often have a wealth of knowledge and might be able to point you towards some hidden gems that aren't as easily found on the major fanfiction platforms.
One common theme is the OC helping Rosalie come to terms with her past traumas. Since Rosalie has a complex and often painful history, the OC can be a source of comfort and understanding for her.
One common theme is friendship. The OC often forms a deep friendship with Rosalie Hale, which might start off rocky but develops into something really strong. Another theme is self - discovery. The OC, being new to the world of Rosalie Hale (usually in the context of the Twilight world), discovers new things about themselves. For example, they might find new powers or new aspects of their personality.