While sitting hidden in an unobserved chair, this 
While sitting hidden in an unobserved chair, this character watches two men thrust a ruler under a woman's skirts to measure her ankles. This character ruins an attempted seduction by yelling "How dare you?! ..You silly, common girl!" when the woman he tried to seduce playfully smacks him on the bottom, shortly after he offered her a confection called the Nipples of Venus. At the end of the first act of the play in which he appears, he asks: "What use, after all, is Man, if not to teach (*) God His lessons?". This character learns rumors through characters called the Venticelli. He encourages another character to include the Masonic rituals in a singspiel, thus enraging Baron von Sweiten and ruining the man who vies with him for the approval of Emperor Joseph. For 10 points, name this fictionalization of a historical composer, the villain-protagonist of Peter Shaffer's Amadeus.
While sitting hidden in an unobserved chair, this character watches two men thrust a ruler under a woman's skirts to measure her ankles.
Antonio Salieri