Hello! B isn't trans, but is loosely inspired by the 'bifauxnen' character type. If you're referring to the legacy demo, any reference to B as "he" as a misconception on the other person's part (Hikaru's case comes to mind), but B usually doesn't mind. Officially, B goes by and is referred to as "she".
Thank you so much for the kind words! We plan to finish it sometime this year...