As his distress noticeably intensifies, the TARDIS starts to realize that this is getting a little out of hand. She'd only meant to instill an appropriate amount of respect, not self-loathing and anxiety at all. What, is he afraid of her? Does he think she is going to punish him? She loathes the thought, and frowns at the sight of him sinking in on himself. It's no longer a frown of displeasure, but one of unease, of some confusion and perhaps even slight concern.

And still the unusual understanding of her nature, when he's prodded out of his unruliness. Perhaps that's a good place to start mitigating whatever it is that he is experiencing now. "Very true," she nods. "You exhibit a better grasp of me than most humans. I appreciate that." Not that it had stopped him from insulting her, but he seems to be quite aware of that misstep now. "Most beings aren't able to relate to me at all unless I interact with them in this form." And she will always find that disappointing at best, hurtful at worst.