Tidus stops when the guy calls out, not unwilling to listen, even lingering for a moment after the invitation is given. But Tidus then continues his leave, not getting out the ’okay’ that’s on the back of his tongue.

He’ll just be there at the spot instead. His back to one of the rooftop walls, sat on the ground with his arms propped on his knees. Away from where the chocobo shelter and the door leading up, but Tidus doesn’t keep a watch of it. When Squall should appear, he doesn’t even look over right away.

But when he does, Tidus waits -- to see what the guy’s mood is going to be and what he might say, quiet in a way that's unusual for him. It's probably not okay to jump in with a ’sup’ to the guy you started a fight with for no good reason.