Chad is a character that only appears in the anime version of Sailor Moon. He did not appear in the manga.
Chad works in the Hikawa Shrine with Raye Hino whom he fell in love with. It has been implied she has feelings for him. He has a bit of muscle on him and and is a heartthrob to other girls, though he has only shown interest in Raye. He has tried to defend Raye from monsters before, only to be horribly beaten, but his injuries usually end up more comical than serious.