A cheerful knight in golden armor, traveling around the world and righting wrongs.

Little do they know the anguish he feels on the inside, for he was cursed by an evil witch to forever wear a huge grin.

Of course, he is a cheerful and jolly fellow in general. The issue is that he no longer has the same range of smiles that he once did - should he be rid of the curse some day, he will relax and change to a subtle smile of satisfaction.