u/ciel-phantomhiv3

I've noticed that throughout a majority of the briggs arc, Olivire is called "sir" by the other soldiers, like Miles. Shouldn't it be something female considering she's a woman? I am watching the dub but also the sub says the same so idk:P is it just a mistranslation or is there a reason that they say this, cause it's not the first time I've seen it in Japanese anime/games.