A third theme could be the cycle of life and death. In a world full of danger and death, Clementine's passing could be seen as a part of this inescapable cycle. This might lead characters to reevaluate their relationship with the world around them, whether it's about being more cautious or more accepting of the inevitable.
Those who were closest to Clementine, like her friends or family if she had any in the story, would likely be main characters. For instance, if she had a group of comrades she had been traveling with, they would be central as they grapple with her loss.
One possible plot could be that Clementine and Duck are on a journey together in a post - apocalyptic world. They encounter various challenges like finding food and shelter. Along the way, they form a deep bond and rely on each other's skills to survive. For example, Clementine's survival instincts and Duck's knowledge of the local area could help them avoid danger.
One possible theme could be redemption. As the end is near, a character might seek to make amends for past wrongs. Another could be acceptance of fate. The characters may come to terms with the approaching end and find peace within it. Or it could be about love in the face of doom, where relationships are strengthened or tested as the end looms.
One possible theme could be self - sacrifice. Batman might have a death wish because he feels that giving his life is the ultimate way to protect Gotham. Another theme could be depression and burnout. After years of fighting crime, he may be so worn down that he no longer values his own life.
Another theme could be growth. Without the presence of this particular person, the protagonist may be forced to become more independent and grow in ways they wouldn't have otherwise. Maybe they start to discover new aspects of themselves or develop new skills.
Grief would be a major emotion. His friends like Tifa and Barret would be heartbroken. Tifa might feel like she lost the most important person in her life again, having already had so many close calls with Cloud. Barret would be angry at the situation that led to Cloud's death and would vow to make things right.
Another common theme is friendship and loyalty. Their relationship is central, and they are often shown being loyal to each other no matter what. In some fanfics, one of them might be in danger, and the other will go to great lengths to save them, highlighting their strong bond of friendship.
One common theme is power struggle. Clementine often finds herself in situations where she has to either gain power or fight against those with more power in the Overlord universe.
Survival is a common theme. Given the nature of the source material, many fanfics depict baby clementine trying to survive in a harsh world. Another theme is friendship. She often forms bonds with other characters.
After Dios death in a fanfic, his followers could split into different factions. Some might realize the wrongdoings of their former leader and try to make amends, while others could become more radical in their beliefs, vowing to carry on Dios' legacy in a more extreme way. The fanfic could also explore the emotional turmoil of those who were close to Dios, like his family or closest aides.