He's got a habit of watching people's faces when they talk. More so than anyone else. He'll turn to keep watching even if he's doing something else, if they're still talking. And when they call him from somewhere he's not looking at, he doesn't always respond... I didn't notice it at first, but lately... maybe because it's more obvious than it used to be.
[ reaches up a hand to his forehead, tugging lightly at the headband ]
The last time I visited you guys, he was coughing. ...it's not the first time I've seen him do that, either.