Who are Randy and Bob?

Bob Sheldon is Cherry Valance's Soc boyfriend, whom Johnny Cade kills to defend Ponyboy. He is handsome, with black hair, and wears three heavy rings; he used them before the story started to cut up Johnny's face.
Randy Adderson Marcia's Soc boyfriend, and Bob's best friend. He is "a tall guy with a semi-Beatle haircut."