1] if I would decide to include the fetish I would probably do a specific heroine for it but maybe with a limited amount of content, since creating entire character front to back is a couple months of work. The heroine would be hidden if player would opt out of seeing this kind of fetish
2] yes, I know what it is
Without going into academic details its derived from japanese futanari, basically a hermaphroditism fetish where a mostly female characters is equipped with both male and female genitals. Although the term itself and the fetish is often portrayed as a female character with only male genitals in recent media.
All in all, if I ever decide to include this fetish in HaremCards I would try to do it justice and not just one short scene. The content would be hidden unless player choose to see it to accomodate people with different tastes.
However the time and amount of energy for creating HC is limited, so futanari is in the realm of theoretical possible future, no promises. People are actually often asking me about including their favorite kink and there is only a certain amount of time and space to do it all.
Cheers for the questions!
Mr. Palm