Jaunty combines ideas such as cheerful, spiffy, upbeat, and natty into one delightfully economical adjective that means all of those things at once!
A jaunty hat is one that's stylish and cheerful at the same time, a quality that can be accentuated if the person wears it in a jaunty fashion, perhaps off to the side or over one eye. Playing the part of a jaunty person is easy if you're feeling upbeat and chipper and want the world to know it. Elves are often jaunty in their own way. Sporting their spiffy outfits and featuring that trademark cheerful spring in their step. The fact they always seem so lively and eager to chat only increases the jaunty impression they make. One can't be blamed for wanting to take a jaunt with the jaunty little guys.