The unexpectedness. Since Lelouch is such a central and powerful character, his death can completely change the dynamics of the story. It forces the writer to explore new storylines and character developments.
The exploration of the aftermath. After Lelouch's death, there are so many things that can happen. New alliances may form, old ones may break. Characters might have to face challenges they never expected without his guidance. It can also be a chance to show the true nature of some characters, who might act differently in a world without Lelouch.
It could be interesting because it shows the fragility of the grand plans Lelouch had. His death might make the other characters realize that his vision was not as invincible as they thought. It can also lead to a re - evaluation of the values and goals in the Code Geass universe.
The power dynamics. When Lelouch gives someone Geass, it completely changes the balance of power. For example, if he gives it to a character who was previously powerless, like a civilian, that character suddenly has the ability to influence others in a major way. This can lead to all kinds of new plotlines and character interactions.
For a 'Code Geass Lelouch Ressurrection' fanfic, a great concept would be to set it in an alternate universe where the resurrection has some unforeseen consequences. For instance, the balance of power in the world has completely shifted. Lelouch has to navigate this new world order while also dealing with his own internal struggles about his identity and purpose.
One interesting plotline could be Lelouch having to deal with the aftermath of his 'death' being faked. Maybe he has to secretly guide the new world order he created without revealing his true identity. Another could be his relationships with the other characters, like how he reconnects with C.C. in a new and different way.
I'm not sure specifically as it's a fanfic. It could be about Lelouch from Code Geass in some sort of capsule - related situation. Maybe it's a unique take on his character, like he's trapped in a capsule and has to figure out a way to escape or use his Geass powers in a confined space. It could also involve some new plotlines with other characters coming to his aid or trying to stop him.
The complex relationship between Lelouch and Suzaku is a big draw. They are two very different characters with different ideologies in the original series. Fanfic writers can explore how they might interact, cooperate or even fall in love in different scenarios. It allows for a lot of creativity.
One great fanfic in this category is 'The Geass Exchange'. It explores an alternate scenario where Lelouch gives his Geass to a different character, Suzaku. This creates a whole new dynamic as Suzaku, with his own set of beliefs and moral code, has to grapple with the power of Geass. The story delves deep into how the Geass affects his relationships, not just with Lelouch, but also with other characters in the Code Geass universe like Euphemia. It's a really interesting take on the concept of Geass transfer and how it can change the course of events.
A unique take on Julius' backstory can make a fanfic interesting. For example, if it delves into his past experiences that were not shown in the original anime. This can add depth to his character.
Well, often the theme of isolation is present. Lelouch was a very lonely character in many ways. In a suicide fanfic, this isolation could be exacerbated. He might feel that no one truly understands him or his motives. It could also explore the theme of power and its consequences. Lelouch had great power with his Geass, and his suicide could be a way of escaping the burden of that power. Maybe he realizes that the power has corrupted him in some ways or led to too much destruction, and death is his way out. And then there's the theme of legacy. His suicide could be seen as a way to leave a certain kind of legacy, whether it's a martyr - like one or a cautionary tale about the pursuit of power.
One more theme that pops up a lot is the exploration of 'what - if' scenarios. Fanfic writers like to play with the idea of what would have happened if certain events in the series had been different regarding Lelouch and Shirley. For instance, what if Shirley had found out about Lelouch's true identity earlier? This leads to different relationship dynamics and storylines in the fanfics, which is really interesting to read about.
One unique feature is the different perspective. A female Lelouch can bring a new emotional depth. For instance, in some fanfics, her relationships with male characters might be more complex in a different way than in the original story.