What are the main themes in the light novel 'I am my wife'?
Since I don't know the exact content of 'I am my wife' light novel, it's hard to say for sure. But possible themes could be identity, self - discovery, and relationship. If the plot involves someone being in the role of their wife, then identity would be a big part as they are taking on a new identity. Self - discovery could come in as they learn about themselves in this new role. And relationship as it would surely affect their relationship with others in the story.
It's difficult to determine the main themes precisely. But if we consider the title, themes such as duality and personal growth could be there. Duality in the sense of being oneself and also being in the role of a wife simultaneously. And personal growth as this new situation would force the character to grow and adapt in ways they may not have expected. There could also be a theme of love, perhaps in the way the character views their relationship with their partner in this new, rather strange situation.
Without having read 'I am my wife', it's speculation. However, themes like transformation and gender - role exploration might be present. If a character is becoming their wife, that's a form of transformation. And this would lead to exploring the roles typically associated with being a wife, which is related to gender - role exploration. Also, there could be a theme of acceptance, accepting this new state of being and how it impacts the character's life.