Feel like the assumption of Tadahh being a guy comes from the name. To me it comes of as more of a male name than female. Also the way talks seems more commanding than I would imagine a woman speaking. Just my two thoughts totally took me by surprise when a clannie posted that in our group chat today.
The name is meant to be ambiguous. Your right. I have dropped many of the "feminine" speech patterns. I don't use overly apologetic speech patterns like throwing in the word "just" into a sentence. For example: I was just checking to see if.... It's generally stuff that comes up with unconscious gender bias in studies. <- Not saying it's inherently bad, just that is what studies show. I've always been a tomboy (Let me tell you a story about how that word doesn't translate), so I have never really held many of those hyper-feminine traits.