
idk if someone has said this already, but i think, although it would be one hell of a revelation, the duke (eventually) learning that yuri is a woman wouldn't have much of an effect on his feelings. i mean, he fell in love w yuri not bcos he sees yuri as a man. he fell in love w yuri bcos she (but currently posing as a "he") is yuri. if anything, it would probably push the duke one, if not a few, steps closer towards admitting his own feelings.
idk about lester, but he probably loves yuri just as much. he saw her grow (he's not a craddle-robber, okay?) as a person and as someone who is passionate to their dreams. if i were him, i would probably grow fond and affectionate of yuri, too. anyways, i feel sorry for him. i pray he finds happiness soon!