Technically using them like that (lol, pun not intended) isn't grammatically correct, apparently--yet. In colloquial speech we use they/them as both singular AND plural, you're right, so I'm sure grammarians will pull their heads out of their asses sometime soon and make it official. I mean, if "funner" can be made a word, they/them can be a gender neutral singular pronoun!(/TДT)/
it's been used as a singular pronoun since the 14th century and dictonaries have listed it as a singular pronoun. famous people like emily dickinson, shakespeare, chaucer, even wycliffe in the 1300s. it is grammatically correct. and has been for a long time. the only people saying it isn't are transphobic assholes.
https://www.merriam-webster.com/words-at-play/singular-nonbinary-they
Wow, google and my school profs have clearly failed me then! No complaints though, I've been using them/their like that since I don't even know when because that's how people use it when speaking, so good to know that it's proper, official use :). (Though if that's the case, I'm not sure why there's people pushing for "zhim, zhers, zhimself" as gender neutral pronouns when we already have ones that are used colloquially and are also officially recognized?? Eh, IDK ╮( ̄▽ ̄)╭)
Bruuuuuuuuuh... I won't argue that Americans can be anal and butthurt about stupid things (as a Canadian, making fun of Americans is one of our favorite pastimes) but it is NOT just America that respects the chosen pronouns of trans or non-binary people . If someone tells you they want to be addressed as she/her, or they/them, or he/him, that's what you do. Becasue it's the decent and polite thing to do, and it takes literally no effort.
In this case, the original Japanese was probably gender neutral so the translators had to make a call. It's been too long since I read this to remember anything, but if the person in question said the words "I am a woman" then they should have used female pronouns. If not, well, being trans and crossdressing are not the same thing so "he/him" could also have been fine, depending on the context. I just don't remember what the context is, lol
It bothered me a bit that they keep refering to the trans girl with "he/him" pronouns