Damel Kafuta is the Washer that wiped all of Sophie's human parents' memories of Sophie and the Lost Cities in Nightfall (the book). He was supposed to wipe Amy's memories as well, but she backed out at the last second. This was because she had thought she could accidentally trigger their memories, but Sophie's enhancing abilities prevented this.
He has dark skin, buzzed dark hair, and shockingly handsome features. Despite being around eighteen, he doesn't look a day past sixteen, having a baby face.