>>720751392
My argument is that you can't find clear design analogues to FW in her previous professional and personal work. You would expect to see more characters that resemble your pic related, or like Byleth, or like Shez, or like Jeralt. But instead we got Brazilian Miku, Gun Nun, and Nohrian Alucard, and Dread Roy.
Do I know for a fact? No. I'm just casting reasonable doubt on the question.
This is what Kozaki draws in his personal time btw.