One possible theme could be regret. Since it's about lost love, there might be a sense of regret for the actions or events that led to the loss of that love.
I'm not sure about this specific 'wanted by her lost love novel'. But some general novels with similar themes could be 'Pride and Prejudice' which has elements of love that was initially lost but regained in a way. Another one could be 'Jane Eyre' where the love between the main characters faces many obstacles.
One possible theme could be identity. Since she lost her name, which is a key part of one's identity, the story might explore how she tries to regain that sense of self.
One possible theme could be self - discovery. The characters might find themselves while falling in love in this unique school setting. Another theme could be the breaking of barriers, as the 'lost borders' in the title might suggest that they are overcoming some sort of limitations in their relationship.
One possible theme could be love. If women are wanted, it might be because they are the object of someone's love. Another theme could be power. Maybe the women hold some kind of power or knowledge that makes them wanted. For example, in some adventure novels, a woman might be wanted for her map - reading skills or her understanding of an ancient language.
Themes in this story could include self - discovery. Losing her name is like losing a part of herself, and she has to explore to find it again. Also, the theme of friendship might be present. She may meet others during her journey who help her, and through these relationships, she learns more about herself. There could also be a theme of mystery, as the reason for losing her name is likely to be a mystery at the start of the story.
Another theme could be the power of dreams throughout history. The novel might show how dreams were seen as powerful forces in different historical eras, whether it was for spiritual guidance, artistic inspiration, or predicting the future. And it could explore how that power has been diminished or changed in modern times.
Regret is a big one. The characters often look back on what could have been and feel sorry for their actions or inactions that led to the loss of love.
One common theme could be self - discovery. Characters often find out more about themselves while being in love. Another might be sacrifice, as they may give up certain things for the sake of their love.
Another theme is self - discovery. Through the process of losing love, the characters often learn more about themselves. In 'Eat, Pray, Love', Elizabeth Gilbert's journey after her divorce (a form of lost love) is about finding herself again. She travels, eats, prays, and in the end, discovers a new side of herself.
Another theme could be self - discovery. Being lost forces the boy to learn more about himself, his strengths and weaknesses. For example, he might find out that he's more resourceful than he thought when he has to build a shelter on his own. It's also a journey of growing up in a tough situation.