Wandering through from network:

I'm curious if people who read the book for the first time as adults are more apt to guess Gen's true identity? Let me know if you did.

I picked up that Gen was hiding something, but because of my past reading and a trope I particularly liked, I guessed that Gen was hiding his gender and was actually a girl. And I assumed that was the case so much that when the actual reveal came, it was disconcerting. (I adored girl-masquerading-as-boy stories as a kid and teen.)