40K idea i've had rattling around my head since forever: recontacted imperial world (perhaps trapped behind a warp storm for a few centuries) that is notably faithful and produces important materials and remarkably loyal troops except the local tradition is fully convinced that Emps is a girl

(the most uncomfortable inquisitor you've ever seen, dealing with the fact that they can't afford to lose this world in this sector and that they're entirely compliant in every other way): uhhh yes this uhh well uhhh the benificent *empress* us uh beyond gender uhh