I just want to gently butt in by saying the half-sexed Boer'alvar are intersex, and acknowledged as much in their culture. Given they're probably also smaller in size as babies compared to other boer'alvar, it may be safe to assume they're assigned intersex at birth, too.
Intersex is a general term used for a variety of conditions in which a person is born with a reproductive or sexual anatomy that doesn't seem to fit the typical definitions of female or male.
Ryn's anatomy is very clearly male. I really don't think the term is a good fit for her.
There's the added problem that trying to apply real world terms to a fantasy species is pointless but that's a different can of worms.