Remus / Thirteen
She was paying very close attention to all of it, maybe a little too focussed on him, especially for the Doctor who's mind was always moving. But it was an indicator that she cared, and she wanted to help him.
The potion sounded complicated, but maybe there was a process to synthesize it a bit easier? Potion making was just chemistry, right? Well, chemistry with magic. But then he described the transformation and she frowned. She looked empathetic. Any creature in pain bothered her, but the knowledge he had to experience it, again and again, was horrid.
"We'll figure somethin' out, maybe just to dull the pain a bit, maybe? Know of anythin' for that?" Maybe if he was unconscious?? She'd have to research it.
"That's awful!" Thirteen went from empathetic to angry in an instant, the idea that any creature would target a four-year old was horrific. It was evil. "I'm so sorry, Remus. So sorry....but I will do whatever I can to help you. I hope the person who did this to you was at least caught."