"Hey. It's me." Most likely Toph figures that he's either dreaming or just coming out of one, so the word is more greeting in case he's waking up more than anything else. Honestly, it's kind of reassuring that he's talking at all, so she doesn't take it too seriously as she plops on the floor next to his bed, back leaning up against the mattress and frame. She's expecting he'll be a little more alert in the next couple of minutes.

Hoping, anyway.

She's not sure why she's there -- just that being there right then is important. So she stays.