Tornados are mentioned only once, and not in the main series, but rather in The Incomplete Book of Dragons.
Physical Description[]
“ | Wheeling by their side, slaloming sinuously through the jutting rocks of the islands, as neat as threading a needle, are the Tornados and the Rocket Rippers, and the odd rare glimpse of a diving Phantom | ” |
— The Incomplete Book of Dragons |
This passage is introducing the Sky Dragon class chapter in the book. Therefore the Tornado is a Riding Dragon in the Sky Dragon class, and must be rather sleek-looking.
It is possible the author meant this dragon to be the Hurricane, which is a Riding Dragon species mentioned in Book 11, How to Betray a Dragon's Hero.
Appearances[]
The Incomplete Book of Dragons[]
Tornados are only mentioned once, at the beginning of the Sky Dragon Class chapter.