@s0che we dont know if all queens can only convert women, when the queens are actual bees they can convert anyway, so who they can convert may depend on the queen themselves, maybe endou is afraid of men and therefore cant convert them? a 3rd queen might only be able to convert children etc...
either the US queen can convert anyone or just men ... OR, she can also only convert women, but the US president is afraid of all her soldiers that he willingly cooperates etc...
I like how Himeno is initially presented as a humble and modest girl who apparently doesn't like to indulge in her status of queen, and then it is revealed how really nuts she's become. "My stinger does not brainwash". lol right, right...