User blog comment:Joekeybladeaura/envy is a boy?/@comment-3196949-20100826043928

Envy in apparently genderless in the manga and Brotherhood but technically male in the 2003 anime. Check out his/its (hit's?) page for more info. While 'he' will work fine in casual conversation or for talk pages, I tend to remove gender-specifics from the Envy page, or at least the manga/Brotherhood section. Call it what ever you like.

You could also argue that the lack of ability to reproduce makes all homunculi genderless, but gender is more how one presents themselves than their actual sex.