Each Endless has a companion. These companions were created by their mother and father as a way for them to truly find a being that they could share their eternity with. To allow for some form of love to blossom and grow such as the love between night and time. Each companion holds a mark of claim on their being to show which Endless holds their soul. Each mark is uniquely different. Hob Gadling was one of these companions. He isn't Dreams.