[Ris has been keeping herself mostly together, but at the suggestion that King might bite the Doctor, her eyes widen and she sits upright off the wall.]

No. [It's said quickly, fearfully. She shrinks back after that, eyebrows knit together.] ...Please. It... would be dangerous for you, if you ever so much as saw him. [...] I don't want either of you to get hurt. Especially not for me.

[She sounds more genuine with that last bit than she has with most of her speech, short of the hysterical screaming.

And to their hypothesizing...]

...I really have no idea. Whatever it was... I'm just glad it's gone.