From Wikipedia, the free encyclopedia. Kwesi Nii-Lante Boakye (KWAY-see boo-ah-CHEE; born April 6, 1999) is an American actor. He is best known as the original voice of Darwin, Gumball's best friend and adoptive brother on the Cartoon Network animated TV series The Amazing World of Gumball. He also voiced Gossamer on The Looney Tunes Show and The Passenger on Bravest Warriors. He also played Mann... show more