Well, a recurring theme is the power dynamics. In the Twilight Life and Death universe, there are different levels of power among the characters, and fanfictions often play with these power dynamics. For example, how a weaker character can overcome a more powerful one through wit or other means. Another common theme is the exploration of the unknown. The supernatural elements in the story open up a world of the unknown, and fanfictions like to delve deeper into that, whether it's exploring new types of vampires or other mysterious creatures.
One common theme is the power of love to transcend the boundaries of life and death. In Twilight, the vampires are already sort of 'between' life and death, and when you add the concept of love beyond death, it becomes even more complex. Another theme could be sacrifice. A character might sacrifice their own 'undeath' or some other important aspect to be with their loved one who has passed on.
One common theme could be sacrifice. Maybe Twilight sacrifices herself for the greater good of Equestria. For example, she might face an extremely powerful enemy and give up her life to save her friends and the land.
A major theme in 'death and life and death stories' is the mystery surrounding death. We don't fully understand death, and these stories often explore that. Also, the cycle of life and death is a big theme. We see how life feeds into death and death into new life, like in the cycle of seasons. In nature, plants die in winter but come back to life in spring, and this natural cycle is often mirrored in these stories.
The theme of transformation is quite common in death life and death stories. When someone is close to death, it can change them at a very fundamental level. Their values, beliefs, and relationships may all be transformed. Also, the theme of acceptance of death as a part of life is often present. People come to terms with the fact that death is inevitable, and this realization can be a powerful part of the story.
One common theme is the exploration of power. Harry, being the Master of Death, has a certain level of power, and when combined with the Twilight universe, it often leads to stories about how he uses or struggles with that power. For example, how he might interact with the vampires and werewolves in the Twilight world with his unique abilities.
Another theme is sacrifice. In many stories, someone may sacrifice their own life to save others. This can be seen in war stories where soldiers jump on grenades to protect their comrades. Sacrifice in a life - and - death context often shows the best of human nature.
Love is a common theme. In many such novels, the love for family or a significant other transcends death. For example, in 'The Lovely Bones', the girl's love for her family is still very much present even though she has passed away.
One common theme is the transcendence of love. In such novels, love often defies the boundaries of life and death. For example, a character might be in love with a ghost or someone from a different realm, showing that love can exist even when one of the parties is no longer 'alive' in the traditional sense.
One common theme is the power of love that can transcend death. Like in the story of Orpheus and Eurydice, Orpheus was willing to brave the underworld for his love. Another theme is the finality and mystery of death. We see this in many stories where the afterlife is depicted as a strange and often unknowable place. For example, in Izanagi and Izanami's story, the underworld was a place of corruption.
One common theme is forbidden love, just like in the original Twilight series. The idea of a vampire and a human being in love despite the odds.