No, there's only one trans character and she's always trans. You can't change that.
I agree.
Even though I absolutely disagree with that user's opinion I think us fans should just show them the reasons why we think CoBD is an amazing game and Philly a fantastic dev.
I hate it when I go to other games threads, comment on some aspects I don't like (like a stupid story, gratuitous blue-balling, extremely young characters, female MCs depicted as brainless sluts, etc.) only to be told to shut up and leave the thread if I don't like the game. Well, the basic idea underlying any discussiong board is to debate about the things you like and don't like, otherwise we are creating echo chambers where everyone thinks alike.
Of course, this applies as long as the user's opinion was expressed politely.
Hey, there's no accounting for taste. Sonja is quite a handful

By the way, some months ago the dev commented on the ages of certain characters. He said that the MC and Sonja were around the same age, him being a bit older:
https://f95zone.to/threads/city-of-broken-dreamers-v1-02-phillygames.25739/post-3489635