I might have been a bit pessimistic about the whole Nao thing, but tbh it's all just nitpicking, you guys have done a great job and I really appreciate all the effort you've put into it!
tl;dr for those who haven't been caught up with the previous chapters— Kou is referred to with gender-neutral pronouns because in Japanese there aren't really any gendered pronouns, and she's still referred to as -kun by the rest of the characters, so the translator prefers to use "they/them" or...