Gender structure
The gender structure, like many other structures, functions across two axes: actual gender, usually determined by biological sex, and contractual gender, determined by contract. Not everyone has a contractual gender, and unless someone has a very well-known contract their contractual gender isn't usually assumed by others.
Actual gender[edit]
Actual gender affect pronouns and most fashion, along with many titles and gendered nouns. For those without a contractual gender it affects everything gender would be expected to affect.
There are very few cases of transgender individuals, and even less of those who are accepted.
Contractual gender[edit]
Contractual gender affects contractual titles and certain relationship titles (e.g. the Evil Queen will always be a Queen and Mother Bear will always be a mother.)
It cannot be changed, as it was fixed to the gender of the template for that contract.