Stubborn was certainly a trait Sasuke was increasingly associating with Sai. He wondered if maybe it was a Team 7 trait (it was a little difficult to deny that Sasuke himself was strong-willed) and then decided that he'd been thinking entirely too much about Team 7 in general recently. They were neither here nor important; what was important was that Usopp had decided to be sensible and to attempt to pass that along to his friend.

"That would be best," Sasuke confirmed, and turned the water off to reach for a towel. "Both of you should focus on keeping yourselves alive more than anything else."

Sasuke had no doubts about whose side the pirate would take should it come down to taking sides, but he also had few worries about fighting Usopp. Sai might present a problem, but what Sasuke lacked in confidence he made up for in tenacity.

... definitely a trait.

Nodding shortly at Usopp one last time, Sasuke picked his way towards the exit.