One common theme is sacrifice. In many such stories, one or both lovers sacrifice something for the other, and sometimes that sacrifice is their life. Another theme is the idea of eternal love. Death doesn't end the love; instead, it's seen as a continuation in a different form, like in the spiritual realm.
In a love and death story, the theme of unrequited love can be quite common. One person may love another deeply, but the feeling isn't reciprocated, and this can lead to a tragic end, sometimes even involving death. Then there's the theme of eternal love. Love that is supposed to last forever, even beyond death. It gives the story a sense of hope and melancholy at the same time. Also, the theme of love as a motivation in the face of death. A character's love for someone or something can give them the courage to face death bravely, whether it's in a war or a life - threatening situation.
One common theme is sacrifice. In many 'life and death love story' movies, one character is willing to sacrifice themselves for the other. For example, in 'Ghost', Sam sacrifices his afterlife opportunities to protect Molly. Another theme is the power of love over death. Love is shown to be so strong that it can transcend the boundaries of life and death, like in 'What Dreams May Come' where the husband searches for his wife in the afterlife.
One common theme is the forbidden love. Since many of the relationships in Death Note fanfiction involve characters who are on opposite sides, like Light and L, it creates a sense of the forbidden. Their love is something that society or their own moral compasses would not allow.
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.
One common theme is the exploration of humanity in the face of advanced technology, just like in the original series. Another is the blurring of lines between life and death, often with characters making difficult choices related to mortality.
Another theme is the power of love against all odds. It doesn't matter if there are external forces like enemies, social barriers, or dangerous situations. Love conquers all in these fanfics. For example, in a fanfic set in a post - apocalyptic world, two people from rival groups fall in love and they fight against not only the harsh environment but also the opposition from their own groups because of their love.
Unfinished business is also a theme. Sometimes in love and death stories, there are things left unsaid or undone. For instance, a man who died before he could propose to his girlfriend, and his love was left with a sense of longing and regret.
One common theme is the struggle between L's duty and his love. L is often portrayed as being so focused on solving the Kira case that his new - found love becomes a distraction or a conflict. Another theme is the secrecy of the relationship, as L has to keep his personal life hidden while being in the public eye for the case.
Power dynamics is another theme. In real - life situations that are the basis for these series, power imbalances in relationships can lead to love turning sour and ultimately resulting in death. This could be seen in stories where one person in a relationship has more control or influence, and when that power is misused, it can have deadly consequences.
One common theme is the struggle with Kid's perfectionism. Since he has his own quirks regarding symmetry, it can create interesting situations in a relationship. Another theme is the power dynamic, as Kid is a powerful being in the Soul Eater world. And of course, there's the theme of acceptance, where the reader character accepts Kid for who he is, including his flaws.