User blog comment:PullingoffMasks/How not to drive folks who edit the Wiki up the wall/@comment-9340689-20140111153621/@comment-11170851-20140111181325

S/He still maintains gender terms...that, if you're not up on the whole gender polticking, is they assume that the individual being discussed is afixed to a binary point.

They/xe/ze/hir are all completely neutral, meaning you can use them without making the assumption that the author has assigned a (usually white western) binary gender (male/female, he/she, etc) to the character in question.

They, as a singular version, tends towards a more inclusive version of writing, as they (singular) does not assume (as an editor or author) binary constructions of speech