So Terri is officially a genderles character, because no one really knows what gender they are so people just call Terri they/them, and since they are a pretty powerful witch I think they could change form, and gender in general to show the cliche visual tropes of man and a woman, and on first glance they do look like a man or a woman, heck they even have different names to match the gender form. I hope you guys like this concept that I may or may not keep