[ Tyr is observant, but not quite observant enough to know he's been watched. He's been preoccupied with his cup of black tea (with a healthy dose of sugar), holding it and trying to warm up from the cold. Really, he shouldn't have put off buying a real coat...
Once he gets feeling back in his fingers, though, he has to notice the other boy if only because having two cups like that is pretty strange. Getting up, he goes to sit next to Oz nonchalantly. ]