Regret is a common theme. Characters often regret the actions or inactions that led to the love being left behind, like in 'Atonement' where Cecilia and Robbie's relationship is destroyed by a false accusation and they both regret the lost time.
Longing. The characters usually long for the love that they once had or could have had. In 'The Great Gatsby', Gatsby's entire life is centered around his longing for Daisy, even though she has moved on in some ways. His parties and his attempts to win her back are all manifestations of this longing for the love left behind.
Another theme is self - discovery. Through the process of dealing with the love left behind, the characters often discover more about themselves. For example, in 'Jane Eyre', when she leaves Rochester, she discovers her own strength and independence. And later when she returns, she has a better understanding of herself and what she truly wants in a relationship.
A common theme is abandonment. Characters in these novels often feel deserted, whether it's by society, loved ones, or fate. Another theme is struggle. They have to fight to survive or find their place again.
One common theme is loneliness. These children often feel alone as their parents are away. Another theme could be longing for family reunification. They constantly miss their parents and hope to be together again. Also, the theme of resilience is present as they have to face many difficulties on their own and still manage to grow and develop.
Well, it could be about change. When things are left behind, it implies that there has been a shift or transformation. Maybe the story focuses on how the characters deal with this new situation after being left. For example, they might have to adapt to a new environment or way of life.
Often, there is a protagonist who is the one left behind. This could be a child, an elderly person, or someone in a vulnerable situation.
Love is surely the main theme. It might be about how love can be the sole remaining significant thing in a person's life.
Survival is a very common theme. Since the game is about fighting zombies to stay alive, most fanfics revolve around how the survivors manage to keep themselves alive in the face of danger. Another theme is teamwork. The survivors in the game need to work together, and this is often explored in fanfics.
One famous 'love left behind novel' could be 'Atonement'. It tells a story of love that is affected by misunderstandings and the consequences that are left behind. The characters' complex emotions and the unfulfilled love make it a powerful and poignant read.
One possible theme could be reminiscence. The things left behind would likely trigger memories and a longing for the past.
I'm not sure specifically as I haven't read it. It could be about a girl who has been left in a certain situation, perhaps left behind by her family, in a place, or during a particular event.
Well, one characteristic is that it can focus on the psychological state of the characters left behind. They may experience a sense of loss, confusion, and longing. Another aspect is that it might depict the physical environment where they are left. It could be a desolate town or an empty house. Also, the 'left behind novel' may show the character's attempts to find meaning or connection in their new, solitary state.