Roland watches Inigo storm off, but whatever instinct he has to chase after him to really apologize dies down at the realization that time is the best thing to calm a teenager down. He's learning as much as he can from them, that much is certain!

So as soon as he's alone with Tidus, he just shakes his head and waves at the other with a casual hand. Sinks himself back into the water, towels forgotten and higgledies back inside his heart...or wherever they go when they're done being mischievous.

"Have a good dip in the ocean. You know where to find me if you need me." Which he doubts, but it's just a nice sign-off to say.