Hello! I apologize for the error; the comment was deleted by mistake, and I couldn't find a way to restore it. That said, I'll do my best to address those concerns now.
I don't believe the Witch's note encourages gender essentialism at all; I made a point of being very clear that the feminine traits I encourage players to express in their Witches are socially determined, not biologically determined. (This is to say, the traits I list as examples are considered feminine in many specific societies, but are not biologically feminine in any sense.) The transmasculine and nonbinary people I've encountered so far haven't expressed any discomfort with the note or what it's intended to communicate, but if the topic does come up from such a person, I'll be happy to clarify.
I also vaguely remember your comment expressing surprise that Kipo and the Age of Wonderbeasts wasn't cited as a touchstone; Kipo was released after the v0.4 edition of this game, and its genre, while close, is slightly orthogonal to what Songs is intended to be.