Though he is a very minor character himself, Willy is the whole reason this episode's story exists. 100 years ago, he and Gordon's grandfather stole a large amount of diamonds and hid them on the moon. Being pursued by the law, Willy put himself into a hibernation machine and slept for 100 years in order to escape the law. Though he is a thief, he seems genuinely good at heart, he wishes his great, great granddaughter, Alice well and doesn't seem upset when finally arrested. Feel free to approach this role however you wish, as there is no reference for this character.