The only people Jefferson had shared a living space with before he was a poor little boy had been Grace and her mother in their poor little hovel. And he was hardly around when her mother was alive, so for the most part he was only used to living with a little girl. He had a feeling Emma wouldn't be much different, only, she was considerably more whiny than his daughter. And anxious. Yet being cautious of her fears and anxities was something he was used to. He supposed finding the same protective and courteous air of consideration about scary things.
"I think we don't need anyone hoovering around and depending on you to get back to their home and ours." For someone who didn't enjoy being annoyed, Emma certainly didn't think a whole lot about avoiding people. That was fine considering those thoughts were always at the forefront of Jefferson's mind. "And if they are anti-magic, then all the better they don't know you have any. There are some worlds who think it's dangerous and view it all as dark and evil."
Not that Emma was any bit evil, any fool could see that, but she was definitely intimidating enough.