Sissy Blakley is Johnny's on/off antagonist.
Sissy is a 11-year-old girl who is a rival of and has a crush on Johnny, but tends to hide it very well through bullying him and asserting superiority over him. Johnny also seems to have a crush on her, although he doesn't show by mocking her and making fun her (e.g., when Johnny refused Dukey's claim that he actually likes Sissy by announcing that he hates Sissy, Dukey told him, "At your age, Johnny, it's the same thing"). However, the two are constantly competing against each other. If Sissy beats him, she will brag about it. If Johnny wins, he'll either get caught into a situation because of it, or brag as much as her. In one episode, Johnny pretends to get used to being bullied by Sissy and they fall in love with each other along with Dukey and Missy. She seems to be the victim to the show's twists, adventures, and misadventures at the end of the episodes that she appears in. She appears in the first and second season, but made a brief cameo in the background during an episode in season three. She has long blonde hair, tied in a ponytail, with a red lightning bolt pattern, multiple ear piercings & white sashes on her skirt with pants underneath. Sissy may actually like Johnny, because in Princess Johnny, she was paying him to play princess with her, and in The Good, the Bad, & the Johnny, after Johnny gives flowers to her, she kisses him.