L's death in the manga occurs as a result of Light's elaborate schemes. Light finds a way to trick L and eliminate him, marking a significant turning point in the story.
One common theme is the exploration of L's hidden emotions. Since L is such an enigmatic character in the original, fanfictions often try to dig deeper into his feelings, especially when it comes to romantic or more intimate relationships. For example, his struggle between his logical mind and new - found emotional desires.
One interesting Death Note L OC fanfiction could be where the original character has a unique ability to read L's thoughts. This adds a whole new layer of mystery and interaction between the two. Another could be an OC who is a detective from another country and teams up with L to solve Kira cases. There are also fanfictions where an OC is a childhood friend of L and has some secrets related to the Death Note.
A common theme is the exploration of the power dynamic between L and Light. In the original series, they are adversaries, and in fanfiction, this often gets reimagined in different ways. Another theme is the idea of trust and betrayal. Since they are constantly trying to outwit each other, fanfictions play with the concept of whether they can truly trust one another. Also, the theme of hidden emotions is quite prevalent, as the characters in the original are not very open about their feelings, and fanfiction writers love to explore what lies beneath the surface.
L is obviously one of the most important characters. He is a brilliant detective with an eccentric personality. His intelligence and unorthodox methods are key to the story. Near also plays an important role. He is another highly intelligent character who is involved in the events related to the Death Note.
The theme of sacrifice also stands out. L is willing to put himself in danger to protect the world from the chaos the Death Note can cause. There's also the exploration of power and how it corrupts. The power of the Death Note is so great that it can turn people into killers, and the novel shows the consequences of such power.
The pairing of L and Misa is interesting because they are such different characters in the original 'Death Note' series. L is highly intelligent and logical, while Misa is more emotional and impulsive. In fanfics, seeing how these two contrasting personalities interact and potentially develop feelings for each other is fascinating.
I really liked 'The Unlikely Bond'. It's a fanfic that starts with L being intrigued by Misa in a way he didn't expect. The writing is quite engaging as it shows how their interactions gradually change from suspicion (as in the original series) to a sort of understanding and then something closer to affection. It's a slow - burn story that is really enjoyable to read.