[Clara intently listens as he talks, smiling as she can hear the passion in his voice. It's clear he's dedicated himself to his Kaiju the same way she has the stars and her travels. By the time he finishes, she's pretty convinced that he's someone that Doctor would likely replace her to travel with.]

There's nothing that can hold you back, once you figure out how to master that kind of bravery. I imagine you'll come to make a difference with them, whenever you get back home.

[The smile she gives him is a little sad.]

I feel sorry for them, and I haven't ever seen one. Or had a look inside their heads. But I'm not sure if that's the recklessness talking, or bravery covering for a death wish.