One common theme is probably redemption. Keith might be seen as a source of healing for the abused reader. He could help the reader overcome their past traumas and start a new life.
There are many fanfic communities out there. Maybe check out Tumblr. Sometimes fans share and recommend fanfics there. Look for tags related to 'keith' and 'abused reader'. However, it might take some time to sift through all the posts to find the right ones.
The fanfic could also explore the social aspects. How does the reader fit into Lestrade's world? Are there other characters who are supportive or skeptical? And how does the relationship between Lestrade and the reader change as the reader becomes more confident and healed? Maybe at first, Lestrade has to be very careful with his words and actions around the reader, but as time passes, they develop a more equal and loving relationship. It might also touch on how the reader's abuse has affected their view of relationships in general and how Lestrade helps them redefine what a healthy relationship can be.
Once upon a time, Keith and the reader met in a small coffee shop. Keith was drawn to the reader's kind eyes. They started chatting and found they had a shared love for art. As days passed, they went to art galleries together. Keith would often surprise the reader with small sketches he made of them. Their love grew slowly but surely, filled with sweet moments and deep conversations.
One challenge could be misunderstandings. Since Keith might be a complex character, the reader may misinterpret his actions or words. For example, if he's quiet for a while, the reader might think he's losing interest when in fact he's just thinking about something important.
Many Shiro x Keith fanfics play with the idea of their different personalities complementing each other. Shiro's leadership and Keith's impulsiveness create an interesting dynamic. For instance, in some stories, Shiro's calmness helps to ground Keith when he's about to rush into a dangerous situation, and Keith's boldness encourages Shiro to take more risks in a calculated way.
One great 'keith x pidge fanfic' is 'Bonding Moments'. It has a really engaging plot that shows their relationship developing in a unique way. The author does a wonderful job of capturing their personalities.
The plot might start with an introduction of Keith and Ivan in their normal lives. Maybe they live in a small town where they are known for their different skills. Then, a conflict arises, like a natural disaster or the arrival of an enemy. This forces them to work together.
In a 'keith x ivan fanfic', the relationship between Keith and Ivan could be one of deep friendship. They might support each other through various challenges. For example, in a story set in a fantasy world, Keith, with his strong combat skills, could protect Ivan, who is perhaps more of a strategist. Their bond could be forged through shared goals, like saving their village from an evil force.
One consequence could be a decline in the fanfic community's morale. When fanfic is neglected and abused, the writers may feel unappreciated and stop creating. Another consequence might be a loss of diverse stories. If readers don't engage properly, some unique and interesting fanfic ideas may never be fully developed. Also, it can lead to a negative reputation for the overall fanfic genre as it gives an impression of being unvalued.