A common theme is often the idea of purity and sacrifice. Holy maidens are usually depicted as pure - hearted, and they might sacrifice themselves for the greater good.
Redemption can also be a theme. Sometimes, the holy maiden has to deal with characters who have made mistakes or are on the wrong path. Through her actions and presence, she might be able to bring about their redemption, showing the power of kindness and forgiveness. This adds depth to the story and showcases the moral compass that the holy maiden represents.
One could be 'The Saint's Magic Power is Omnipotent'. It also features a female lead with special abilities like a holy maiden might have.
One common theme is the power of heritage. The holy ancestor usually leaves behind a powerful legacy that the characters in the present have to deal with.
In Western fantasy novels, there were some strange situations regarding the plot setting of the Holy Maiden of Light. For example, in a Western fantasy story, Leticia thought she was a dark witch, but was taken back to the church's lair as the Holy Maiden of Light. After that, a series of absurd things happened. The archbishop, the Holy Knight, the emperor, and the young master of the nobles in the church had different reactions to her. In fact, her real identity was very different from the Holy Maiden of Light. There were also some scenes in which the Holy Maiden appeared and disappeared quickly when the Archbishop of the God of Light summoned her. These all showed that the role of the Holy Maiden of Light in the Western fantasy story might have a plot that did not conform to the conventional understanding. " Shen Mingri " is equally exciting. Everyone is welcome to click and read it!
There's also 'Re:Zero − Starting Life in Another World'. Emilia has qualities of a holy maiden. She is kind - hearted and has a certain air of purity. Her story in the light novel is full of trials and her character development is quite engaging.
One common theme is the struggle for power. As the pet - like characters evolve, they often face challenges that require them to become stronger. For example, in many such novels, they have to fight against stronger enemies or survive in a harsh environment. Another theme is the discovery of new abilities. As they evolve, they unlock new skills or powers that help them in their journey. For instance, a character might gain the ability to fly after evolving to a certain stage.
One common theme is the bond of friendship. L and his pet form a unique connection that is often explored.
One common theme is the bond between the human and the dragon. It's about how they develop trust and friendship. For example, in some novels, the dragon starts off as a wild and powerful creature, but through the human's kindness, they become close companions.
The exploration of new worlds or areas is also common. As the pet evolves, it might unlock the ability to access new places. This can lead to adventures and discovery of new species or powers. And sometimes, there is a theme of mystery, like uncovering the secrets behind certain pet evolutions or the origin of the pet evolution system itself.
My answer might be a little different from the novel you described. According to the information I have, this type of novel rarely appears because it involves the power of darkness and light and the relationship between them. This kind of plot might appear in science fiction or fantasy novels. If you can provide more information about the novel, I will try my best to provide you with a more accurate answer.
It could be that the story is set in a fantasy world. Maybe the holy maiden has some special powers or a special role in the world. And the idea of her being a pet might suggest an unusual or unique relationship with the protagonist. For example, perhaps the protagonist discovers the holy maiden in a weakened state and takes her in as a pet, and then as the story progresses, their relationship and the mystery around the holy maiden's true nature unfolds.