question about sealskins: how do trans shapeshifters work? do their bodies know they're trans before they do and shift that way automatically? could they consciously shift their natural state when they realize their gender identity? or does it take gender affirming surgeries to 'reset' their natural state?
you got ahead of me-- Leo Harp is trans! the fun selkie-themed name isn't an alias, it's his chosen name.
there are two answers to this general line of thought!
in practice, most trans shapeshifters use conscious shapeshifting to transition, and do some mild "touchup" shifting once a week or so. it's roughly the same effort as remembering to take a T shot, without the need to involve a doctor.
it's remarkably easy shapeshifting and can usually be accomplished before a kid is old enough for a full copy-- most commonly gendered body parts like genitals are formed from early development tissue that is found in every viable fetus (shoutout to my old pal the mesonephric duct) that is then changed from being exposed to hormones, so you don't have to "borrow" anything from another person. you already have the genetic coding for the basis! physical sex is much less intrinsic and binary than society treats it so it's super easy for shapeshifters to mess with.
in THEORY, though, if you wanted to change your baseline form so that you didn't have to keep up the shapeshifting, you can change your "natural" state with surgery or medication. it's just a lot harder than having a bowl of spaghetti to carboload and making some changes.