My fursona was never trans, but she was always a girl. She represented the ideal version of myself, who turned out to also be a girl, heh.
Her species has changed, though. Originally she was just a dog of some sort. Then at some point I decided I wasn't afraid to break the mold a little bit, and now she's a zebra. That species change DOES coincide with my own gender identity journey, though.
(To be clear, I've just retconned Hanalei into being a zebra the whole time -- it is not the case that Hanalei herself was originally a dog (*) who transitioned into a zebra, haha)
(*) ADAB: Assigned Dog At Birth?
If someone finds themselves wanting what LLVM does, but doesn't want to link against LLVM (which is fair) then I might point them to QBE https://c9x.me/compile/