The theme of sacrifice might also be present. Maybe characters have to make difficult choices that lead to bad ends, and these choices often involve sacrificing something important, whether it's their relationships, their ideals, or their own lives. The light novel may use these themes to create a thought - provoking and often gloomy story.
Another theme could be the fragility of human nature. In difficult or extreme situations that lead to bad ends, the characters' true natures may be revealed, showing how easily they can be broken or corrupted. It may also explore themes of fate, as the bad ends could imply that the characters are unable to escape their pre - determined negative outcomes.
The theme of survival also stands out. Throughout his journey, the main character has to endure various hardships and challenges, which reflects on the human will to survive in a harsh world. For example, he faces poverty, war, and moral decay, yet he keeps going.
Without having read the 'bad end night story' in question, it's hard to name the main characters. But generally, in a night - based story with a bad ending, the main characters could be individuals who are trying to survive or achieve something during the night. They could be a detective trying to solve a crime that takes place at night but instead gets caught up in the criminal's web, or a family whose peaceful night is disrupted by some unforeseen and malevolent force, and they are then the ones who have to face the consequences of this bad - end situation.
The 'bad end night story' could potentially be a story centered around the night time, which is often associated with mystery and danger in literature. It might tell of a character's downfall that takes place at night. For example, it could be a story of a young adventurer who gets lost in a dark forest at night and instead of finding his way out or achieving his goal, he meets with some tragic fate, like being attacked by a wild beast or getting caught in a trap set by an evil entity. The night in such a story would serve as a backdrop to heighten the sense of fear and the finality of the bad ending.
The main themes could include the end of an idyllic or utopian setting (as 'Arcadia' often implies a paradise - like place). It might also deal with themes of loss, change, and the characters' struggle to adapt to the new situation.
The theme of revenge is also prominent. Yuichiro is driven by a strong desire to avenge his family's death at the hands of vampires. And there's the theme of power and its corrupting influence. As characters gain more power, they face the temptation to use it for wrong purposes.
Love and friendship are also important themes. The relationships between the characters, whether it's romantic love or platonic friendship, play a crucial role in the story. For instance, the way friends support each other during difficult times and how love can change a character's perspective.
One main theme could be friendship. Characters often rely on each other and form strong bonds. Another might be self - discovery. The characters may grow and learn more about themselves throughout the story.
The theme of fate itself is very prominent. The characters seem to be guided by some unseen force, yet they also try to fight against it. It's like Shirou, who has his own ideals about justice which sometimes clash with the pre - ordained 'fate' in the story. And love is also a theme. The relationships between the characters, especially the romantic ones, add a lot of depth to the story.
One similar light novel could be 'Another'. It also has a somewhat dark and mysterious atmosphere with unexpected twists and turns in the plot.
I'm not entirely sure as there might be a lot of different interpretations. It could be about some sort of nightmarish or negative events that happen within the Vocaloid universe, perhaps involving the characters in Vocaloid having a 'bad end' during a night - related scenario.