Well, transformation is a big theme. Lucifer's character often transforms when he meets his soulmate. His views, his goals, and his way of interacting with others change. Another common theme is the exploration of Lucifer's past. How his past experiences shape his relationship with his soulmate. And finally, there's the theme of acceptance. Lucifer has to accept his soulmate and all the changes that come with it, and this is a central aspect in many of these fanfictions.
One common theme is redemption. Often, the presence of a soulmate makes Lucifer question his actions and strive for redemption. Another theme is the power of love. The connection with the soulmate is so strong that it can overpower Lucifer's demonic nature. And also, there's the theme of fate. It shows that even a powerful being like Lucifer is bound by the concept of a soulmate which is pre - determined by fate.
The power dynamics between different supernatural species is also a big theme. For example, if a werewolf and a vampire are soulmates, how do their natural instincts and powers interact? It can lead to some really interesting plot twists. In addition, themes of sacrifice and protection are common. Soulmates will often go to great lengths to protect each other, even if it means sacrificing their own power or status in the supernatural hierarchy. And this can create a lot of emotional and action - packed scenes in the fanfiction.
Fate is also a big theme. Fanfictions often play with the idea that the characters were always meant to be together as soulmates, no matter what they've been through. It gives a sense of destiny to their relationships, which adds a whole new layer of depth to the characters' stories in the Supernatural context.
A common theme is the battle between good and evil. In both Supernatural and Lucifer, this is a central concept, and fanfictions often explore it further. For example, how characters are tempted by evil or strive to do good in difficult situations.
One common theme is the struggle between good and evil. Since Crowley is a demon, his relationship with his soulmate often challenges his demonic nature. His soulmate might be good - hearted, and Crowley has to decide whether to embrace the good or stay true to his evil ways.
One common theme is the struggle against fate. Since in the Supernatural world, things are often chaotic and dangerous, the idea of having a soulmate can seem both a blessing and a curse. So, characters often struggle with whether to embrace the connection or fight it.
One common theme is the struggle between Michael's angelic duties and his connection to his soulmate. His loyalty to Heaven and his new - found love often clash.
The unique aspect is the combination of the 'Supernatural' universe and the idea of Lucifer having a soulmate. It's not a common concept in the original series, so fanfiction writers get to explore uncharted territory. They can create their own interpretations of how Lucifer would behave in a soulmate relationship.
Power struggle is a very common theme. The idea of Lucifer being a powerful entity and the use of bondage to either restrict or enhance that power. For example, in many fanfictions, the hero might try to use bondage to limit Lucifer's abilities.
One common theme is redemption. Writers often explore the idea of Lucifer seeking or being offered a chance at redemption through the comfort he receives. Another theme is the struggle between his dark nature and the possibility of change.
Redemption is often explored. In Supernatural, many characters are on a journey of redemption, and when Lucifer is added to the mix, the idea of whether he can be redeemed or not becomes an interesting plot point. For example, some fanfictions show Lucifer being influenced by the Winchesters' sense of justice. Another common theme is the disruption of the natural order. Lucifer's presence in the Supernatural universe throws a wrench into the already complex balance of good and evil, heaven and hell, that exists in the series. This can lead to all sorts of chaos and interesting story developments.