I'm not sure, but he'd probably panic and/or start threatening it. If you're really curious, you might want to ask the creator of the show (Jhonen Vasquez).
very dangerous so stay away from them
It isn't. Although the eye of a tornado is relatively calm, to get to it you have to go through the core winds of the tornado. It would be impossible to stay in the eye for very long.
It is safest to stay underground if you hear/see a tornado.
You would want to go to an under ground celer where the tornado can't reach.
The average tornado lasts for about 5 minutes.
until the tornado ends and then the people fall and die or get injured
You stay on Rockhopper's ship by not getting off his ship, that is going into some other room.
No. A "sand tornado" (which is a dust devil, not an actual tornado) will move in whatever direction the wind around it is blowing.
are tourist who arrive and stay on a cruise ship are tourist who arrive and stay on a cruise ship
Yes so long as you stay in it.
hide in your basement and stay away from windows
Well, first you would need the essential materials such as water, food, and especially you should have shelter. Stay away from glass. Once in a tornado, a nearby store would certainly not be open to provide any food or water.