I found it interesting that you had trouble seeing Seivarden as anything but male, because I had trouble thinking of any of any the characters, including Seivarden, as anything but female. The "she" pronoun is so attached to femininity in my mind that I had to consciously remind myself that Seivarden was male sex and readjust my mental image of every scene.

For me, all the Radich characters presented as female in my mind.