( Addressing this is going to have to be delicate. She doesn't know when Daenerys is from but it is clearly from before she'd come to Winterfell, if she doesn't recognize her. Hmm. Sansa thinks she'll just have to be very, very careful. )

I am Sansa Stark, Queen in the North. I know you but it seems like you haven't met me yet. This place...does that from time to time. As to how you can see others over this? It's magic. They call it technology and science here but as you and I know it, it's magic. It's beyond even what the Old Valyrians could do, I imagine.