I'm saying, that gender makes no difference to them. They associate themselves with various emotions, not appearances.
Bah, english is hard. Hope you understood what I meant.
I wouldn't consider justice, honor, and faith emotions. Spirits and demons seem to connect themselves to concepts that mortals put a lot of belief into. You wouldn't want to become a Spirit of Tipping Well, but you might want to become a Spirit of Generosity. Likewise, a spirit that feeds on/builds themselves around the concept of masculinity or femininity will probably do well.
As far as having a gender, there are millions of spirits and demons in the Fade. Unless gender is impossible for them, you'd think there would be some with a gender.
Is it difficult to believe spirits/demons don't have a concept of gender, the way humans/elves/dwarves/qunari do?
Yes. Spirits build themselves around mortal concepts. Why would the concept of Justice be something a spirit could embody, but not Femininity?
Spirits and Demons seem to have a wide range of concepts they've taken from mortals. I don't think gender is a particularly difficult one to grasp.