If we want to get pedantic. Hermaphrodites are a real thing that exists.
I don't want to get pedantic, I want people to think before posting
Trans indicates a character who internally identifies as a gender other than the one they were born with and has taken steps to alter this to more accurately reflect their inner self, futa (when used by western, or at least non-Japanese, writers) is the best available umbrella term (that doesn't sound like a slur) for any fem presenting character with a dick that doesn't match that former description. There are different ways this presents, third biological gender, magical alteration or sci-fi bio enhancement and the way this presents varies too, the penis could extend from within the vagina or the clitoris could morph into a penis as required, it could exist as an alternative to the clitoris on an otherwise cis-woman, she could have cock w/balls and pussy, cock and balls or cock and pussy. Hell, the futa could have a vagina w/exterior balls and reproduce by spreading sperm into her aquatic environment to fertilise eggs laid by another aquatic futa
The dev chose to call the game Futa Dormitory, not Trans Dormitory