Rosa was probably so annoying at Castle Baron that Cid was more than happy to send her of on an airship. It doesn't bug me as much as the Zot plot, where she cast the Exit spell for the party to escape. You couldn't have done that before Cecil and co. entered the tower so that no one would have to? An old man died because of that trip. Rosa should have cast exit right away. Back to Kaipo, Cecil had to fight a dragon and rescue a child, so they probably got sidetracked with that. Rosa probably just went straight there. (I tried; I have no idea.)