What are the possible themes in 'the last cantata novel'?

One possible theme could be redemption. The angel in the novel might be there to help a character find redemption for past sins or mistakes. Another theme could be love, perhaps the angel experiences or helps others experience a different kind of love, like divine love or selfless love.

I'm not sure specifically which books are exactly like 'the last cantata novel' but some novels with a similar sense of mystery and deep themes could be 'The Name of the Rose' by Umberto Eco. It has a complex plot set in a medieval monastery full of secrets.

One possible theme could be the power of stories. Since it's about the last storyteller, it may show how stories can influence people, shape cultures, and even change the course of events.

Survival could be a major theme. If it's about the last women standing, she must be fighting to survive in a difficult situation.

Love and loss could be a theme. Often in love novels, the characters experience the joy of falling in love and then the pain of losing that love in some way.

Survival is likely to be a big theme. In a post - apocalyptic world, the characters, including the empress, would need to fight for their lives.

It could be about mortality. Since it has 'last day' in the title, perhaps it explores the idea of facing one's end, like coming to terms with death, regrets, or unfulfilled dreams.

One possible theme could be love and lust. Since it involves a mistress, there's likely to be an exploration of the passionate and often complex relationship between two people who are not in a traditional marriage or committed relationship.

As I don't know the novel specifically, but common themes in 'last human' novels could be loneliness. The last human would be all alone, facing a world without others of their kind.

Another possible theme is adventure. Summer is a time for exploration. In this novel, the boys might be going on hikes, exploring the woods, or trying new things like fishing in a new lake. They face challenges and grow from those experiences, which is a common theme in many youth - centered novels.