Tom keeps running into (he almost ran into Tom Swift in Tom Swift and His Motor-Cycle), resulting in a rivalry between them extending over several volumes. Usually referred to by the narrator as a "bully", his antipathy to Tom sometimes approaches murderous extremes. Has money (legally or otherwise) and uses it to attempt to match Tom's public repute and fame. He usually comes to grief before the end of each novel. Koku — A giant who Tom picked up on a trip to Patagonia, he usually does work guarding the Swift place and engaging in heavy lifting as needed. Has a limited grasp of the English language. Mary Nestor — Tom's girlfriend and later wife; mother of Tom Swift Jr. and his sister Sandra. Tom and Mary's honeymoon was in one of Tom's inventions, his House on Wheels. Swift, Tom