Redemption is also a big theme. The demon may be seeking redemption through their relationship with the angel, or the angel may be trying to redeem the demon. For example, the angel could believe that there is good in the demon and tries to bring it out.
One common theme is forbidden love. Since demons and angels are often seen as polar opposites in the lore, their relationship is considered taboo.
Another theme is the battle between good and evil within the relationship. The demon might represent the 'evil' side with their dark powers and nature, while the angel represents the 'good'. But as they get closer, they realize that these concepts are not so black and white. The demon may have some good qualities and the angel may not be as perfect as they seem.
A prevalent theme is the exploration of identity. The angel may question its own purity when in love with a demon, and vice versa for the demon. The lemon parts of the story add a layer of physical and emotional exploration, which ties into this theme of identity. In many of these fanfictions, the relationship is not just about physical attraction but also about how they redefine themselves through their love.
Redemption is often seen. The demon may be seeking redemption through the love of the angel or vice versa. Also, the idea of defying fate or the order of things. Since angels and demons are supposed to be on opposing sides, their relationship goes against the natural order in their fictional universes.
The theme of sacrifice is also quite common. Whether it's the angel sacrificing his place in heaven or the demon sacrificing his power for their relationship. And there's always the overarching theme of love conquering all. Despite the differences, the love between the angel and the demon is strong enough to overcome the obstacles of their opposing natures and the hostility from their own kind.
One common theme is the struggle between good and evil within the relationship. The angel represents all that is good and pure, while the demon stands for the opposite. Another theme could be redemption. Maybe the demon is redeemed through the love of the angel. Also, there's often the theme of forbidden love as angels and demons are from two very different worlds and are not supposed to be together.
Love is also a frequent theme. There can be love stories between angels and humans or even between angels and demons in some cases. For example, in some novels, a demon may fall in love with an angel, which challenges the traditional view of their relationship and adds an interesting dynamic to the story. This love often has to overcome many obstacles due to their different natures.
One common theme is identity. Since the character is a hybrid, they often struggle to figure out who they are and where they belong. Another theme is power. Hybrids usually have unique powers that can be both a blessing and a curse.
One common theme is the exploration of their unspoken feelings. In the show, their relationship was complex, and fanfiction often delves deeper into those emotions that were hinted at but not fully explored. For example, how they might deal with jealousy when one of them is interested in someone else.
One common theme is the exploration of their complex relationship. Given their history of rivalry and shared vampiric nature, many fanfictions dig deep into how they interact with and feel about each other.
Another theme is loyalty. Despite their differences and occasional rivalries, they are often shown to be loyal to each other in fanfictions. For example, in many stories, they will go to great lengths to protect one another.
Love and friendship are often explored. It could be a slow - burn romance where they overcome obstacles to be together, or a strong platonic bond that helps them through tough times. Another theme could be redemption. Maybe one of them has a troubled past and the other helps them find a new path. For example, if Buster has made mistakes in his past, Angel could be the one to guide him towards a better future.