I really like 'Among the Shadows'. In this fanfiction, the OC has a mysterious past that ties in with some of the BAU's toughest cases. It delves deep into the character's psyche and how they interact with the well - known 'Criminal Minds' characters. There are a lot of emotional moments and great character development throughout.
One possible storyline could be the sister getting involved in one of the BAU cases in an unexpected way. Maybe she has a special skill or knowledge that helps the team solve a particularly difficult case. For example, if she's a psychologist herself, she could offer a different perspective on the unsub's motives.
One great Criminal Minds OC sister fanfiction is 'The Unseen Sister'. It adds a new character, an OC sister, into the BAU team's world in a really interesting way. The story focuses on how she copes with the challenges of the job while also having her own personal struggles.
There are fanfictions where the intelligence - gathering skills of the Criminal Minds agents are combined with the combat abilities of Bleach characters. Maybe Reid from Criminal Minds teams up with Rukia to stop a serial killer who has some connection to the Soul Society. They use their unique skills, Reid's eidetic memory and Rukia's zanpakuto skills, to crack the case.
There might be a fanfiction where the BAU has to deal with a case that hits very close to home for one of the members. This could create a lot of internal conflict and drama within the team, making for a really engaging read.
One great fanfiction could be 'The Unseen Middle Man' which delves into the mind of the middle man character in a really unique way. It shows his backstory and how he got involved with the cases in a different perspective than the show usually presents.
One common theme is family. Since the OC is a sister, there's often exploration of family dynamics within the context of the BAU. Another theme is acceptance. The OC sister usually has to prove herself to the team and gain their acceptance. For example, in many stories, she might have an unorthodox method of profiling that the team is initially skeptical about.
One popular 'Criminal Minds Reid sister OC fanfiction' is 'The Unseen Bond'. It focuses on the relationship between Reid and his sister in unique ways, exploring how she copes with his dangerous job and her own life.
One great place to start looking for Criminal Minds OC Rossi sister fanfiction is Archive of Our Own (AO3). There are often well - written stories there. You can search using the tags like 'Criminal Minds', 'Rossi', and 'OC' to narrow down the results.
One great source for Criminal Minds Tara OC sister fanfiction could be Archive of Our Own (AO3). Just search for 'Criminal Minds Tara OC sister' on their site and you'll likely find a variety of stories.
A great plot could be that the OC is a hacker who gets involved with the BAU because they unknowingly hacked into some information related to a serial killer. Morgan is assigned to keep an eye on the OC. As they work together, they start to respect each other's abilities. The OC could also have a personal vendetta against the killer which adds an extra layer of drama. They could also develop a romantic relationship as they solve the case.