"lose representation?" Oh please, there are millions of femboys in modern media. Trans characters are much rarer. If you're going to complain about representation, complain about the lack of trans representation, and the transphobia that leads studios (especially anime studios) to this massive unbalance.

She's a fictional character, but the pathway from GNC to trans is not exactly uncommon in reality, and I am sure a lot of people, including myself, can relate to it.

Sure, femboy representation should not disappear, but if you want fair representation, there would be a hell of a lot more trans characters, and a hell of a lot less femboys than there are in media today.