Don John

Don John is the half-brother to Don Pedro, Prince of Aragon, and the main antagonist of the William Shakespeare comedy Much Ado About Nothing. A malcontent resentful of his brother, he tries to combat the merriness of those around him by ruining the upcoming marriage between Claudio, a soldier and friend to Pedro, and Hero, daughter to Leonato, Governor of Messinia and another friend of Pedro's.