"He's a friend who lives at the base. I found him when he first got here a few months ago. I'm sure he's taking good care of you." She gives Andrew's shoulder a reassuring pat with the hand that isn't already occupied with her feline informant.

"I don't think he's been here before, though... maybe I should try to go meet him." It might not be safe to assume that Edgar's Andrew has even told him to go to the TARDIS (assuming he's capable of telling Edgar anything at all; the cat really wasn't clear on how badly he was hurt).