Another theme could be adaptation. In these fanfics, characters often have to adapt to deal with the presence of parasites. For example, the clones might need to adjust their combat tactics or medical procedures. And the Jedi might have to use their Force abilities in new ways to sense or combat the parasites. It's about how the Clone Wars universe changes in response to this new threat.
One common theme is the idea of an unexpected threat. Parasites are not the typical enemy in the Clone Wars, so it makes for an interesting twist.
One common theme is loyalty. The clones are loyal to the Republic and their Jedi commanders. Another is brotherhood. They rely on each other like family.
One common theme is loyalty. You often see clones having to choose between their loyalty to the original clone army programming and their newfound beliefs in the rebellion. Another theme is identity. Clones struggle to define themselves outside of their military roles.
One common theme is the self - inserted character trying to fit into the complex political and military situation of the Clone Wars. They might struggle with choosing sides between the Republic and the Separatists.
Themes in this type of fanfiction can be quite diverse. The idea of self - discovery is a big one. Clone troopers start to question their purpose and place in the universe. Another common theme is the relationship with the non - clone characters, be it the Jedi, the civilians, or the Separatist forces. How they interact and how their relationships develop is often explored. And of course, the theme of following orders versus doing what is morally right, as clone troopers are trained to follow orders but sometimes face moral dilemmas during the war.
One common theme is identity. Clone troopers were bred for war, and in the Rebels era, they have to figure out who they are outside of the military structure. Another theme is loyalty. They have to decide whether to stay loyal to their original programming or side with the Rebels.
One common theme is identity. Female clone troopers may struggle with how they fit into the clone army and the 'Star Wars' universe in general. Another theme could be friendship or camaraderie, as they form bonds with their fellow troopers, male or female.
I'm not sure of the exact title, but there could be a 'Clone Wars parasite fanfic' where the parasites are actually a biological weapon created by one of the Separatist factions. This would add a whole new layer of intrigue to the Clone Wars story, as the Jedi and clones try to figure out how to counter this weapon while also dealing with their regular foes.
One common theme is Anakin's struggle with the dark side. In many fanfictions, his journey towards the dark side during the Clone Wars is explored in more depth. Another theme is his relationships, like with Obi - Wan, Ahsoka, and the clone troopers. For example, how he mentors Ahsoka and the brotherhood he forms with the clones.
One common theme is loyalty. Wolffe is known for his loyalty to the Republic and his brothers, and this is often explored in fanfiction. Another is survival, as he faces many dangerous situations in the Clone Wars.
One common theme is the clash of different power systems. Doomguy has his own brute - force combat style and powerful weapons, while the Clone Wars has the Force and lightsabers. Another theme could be the idea of a lone warrior (Doomguy) in a large - scale war (Clone Wars).