I just got to the scene where you see Peyton for the first time and I don't think it's transphobic to state that someone used to be their opposite sex. What is transphobic is painting a trans person as crazy and violent.
There's a big difference between saying "trans
people are crazy and violent" and "this
one trans
person is crazy and violent". Also it'd be weirdly biased to say "
no trans people are crazy and violent" when they're supposed to be just like everyone else, no?
It seems you haven't gotten to this part yet, but another prominent trans character is introduced later in the story, and they are
not crazy and violent. I'm actually kind of impressed with how this game handles trans characters, you know, as if they were just people.