He gives the moogle his full attention for a moment, laughing at the comment. "I think I've got an idea of who you're talking about," because of course, he suspects Molg is referring to himself. They were such strange creatures, and Goku's actually not sure where his ran off to- probably napping. He laughs again, but it subsides quickly once Cloud speaks.

"I promise I won't let anything happen to this world or anyone else's." The words are sincere, with an underlying determination behind the kindness of the statement. "If we don't take care of things here, then everyone else back at home is in trouble too, right? So we have to try."