Dooley, also known as "D", is the so-called "mad" inventor in G's Family. Although a very kind penguin, his style of dress and overall appearance make him look very frightening to other penguins. He earned the "mad" title because of his insane inventions that resemble torture devices (though they are not). His 6th birthday is on May 29th 2011. He is considered a "child prodigy" among many scholars.