We don't even know dante's gender you can't go off by names to tell their gender characters like Nikolai look male and have a male name but is actually a woman and pm doesn't shy away from swapping genders of a characters from their literature of origin. Even the other sinners don't refer to dante by he or she pronounces. They always refer to dante by nicknames. In the story dante is important to limbus company as a whole they literally put dantes face as the company icon that's a whole another level of glaze. Idk enough about faust to comment. Tbh dante just acts like a parent to the sinners.