He doesn't look particularly surprised by this information.

"I wanted to be intimidating."

So, in that sense, mission accomplished. Not to her, of course. He hadn't had her in mind when he first chose the visage. Still, he hadn't been aiming for something approachable like Kalecgos or Chromie. In a way, it's a blessing he's still a step down from Onyxia: she'd chosen her form specifically to manipulate mortals. She'd succeeded, too, for quite some time. Wrathion had done some manipulating in his time, but he's never used his own body to do it.