Since it's a fanfic, it could be really diverse in its content. It might be about the main characters from Code Geass having new adventures in the European part of the world during those five years. It could involve new mecha designs specific to that area, new cultures being introduced, and different ways that the characters interact with the local population. There could be a new antagonist or a group of antagonists that are causing trouble in this 'Euro' part of the Code Geass world, and the story could be about how the heroes deal with them over the course of five years.
I'm not sure which characters are the main ones in this particular fanfic. It could be Lelouch, as he is a central character in the original Code Geass series. Maybe it also includes C.C., who has a significant role in the story. But without reading it, it's hard to say for sure.
Well, it could be about the restoration or recovery of certain elements in the Code Geass world. Maybe it's about recovering lost technology or powers. Fanfics often take the existing lore and expand on it. So this could be centered around a character trying to recover something important that was lost during the main storyline. It could also be about the recovery of relationships between characters that were strained or broken.
A fanfic about Cornelia could be a character study. It could delve into her past, like her upbringing in the imperial family and how that shaped her into the strong - willed person she is. Maybe it could also show her softer side that she doesn't often display in the anime.
The 'Code Geass Kallen Expansion Fanfic' is probably about taking Kallen's character from Code Geass and building on it. It could be a story that gives more screen time to her motives. Maybe it shows how she became so dedicated to the cause of the resistance. It could also detail her relationship with Suzaku from a different perspective. It might add more depth to her character by showing her making difficult decisions that were not shown in the original series and how those decisions shape her future in this fan - created expansion.
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.
A 'Code Geass Chaos Fanfic' is likely a work of fan fiction that plays with the 'Code Geass' universe in a chaotic way. It could introduce new characters that bring disorder to the existing order in the anime. For example, it might have a character who has a unique 'Code' that messes up the power balance between the Black Knights and Britannia. It could also explore different timelines or alternate universes where chaos reigns.
Fanfics often take on different genres as well. Some Code Geass Code Fanfic are action - packed adventures that take the characters on new quests outside of the original storyline. Others could be more of a mystery, where the characters have to solve a complex problem that was not part of the original plot. And then there are the ones that are more character - driven, focusing on the emotional growth and development of the characters.
A fanfic could center around Cornelia's relationship with her sister, Euphemia. It could show their sisterly bond, their differences, and how they support or oppose each other in the complex world of Code Geass.
In Code Geass fanfic, Nunnally is often a complex character. She is usually depicted as a symbol of innocence and hope. Writers might explore her relationship with Lelouch in different ways. For example, some fanfics might focus on how she would react if she knew all of Lelouch's secrets and plans. Her blindness also adds an interesting layer to her character, as it can be used to show her inner strength and vulnerability simultaneously.
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.