Season 1 starts the series introducing the main casts: Joker, Queen, Spade, Hachi, Dark Eye, Roko and Silver Heart. Against them are the police feacturing Inspector Oniyama and his subordinates, Ginko Kurosaki and Momo Shirai and other recurring characters who challenge Joker such as Mr. Kaneari and his secretary, Kaneko. But the main antagonists, Shadow Joker and Professor Clover along with Lady Doubt tend to do more that get in Joker's way.