Rusty is a minor recurring antagonist in the Full House series. Rusty (played by Jordan Christopher Michael) is the son of Cindy, Danny's girlfriend, in season four. He has a reputation for being a troublemaker and a prankster. In the episode "Terror in Tanner Town", he spends the day with the Tanners, and wreaks havoc throughout the household, including tucking the tablecloth into Danny's pants, punching a hole in the milk carton, giving D.J. and Stephanie trick gum that turns their teeth black, locking Jesse and Becky in the former's room and D.J. and Stephanie in their room across the hall by tying the doorknobs of both rooms' inward-opening doors together with a rope, taping over Joey's comedy video with a clip of himself on his own comedy show (which he calls "Rustyvision"), making Danny fall in a mud puddle while tossing the football around, feeding Comet a rump roast while D.J. and Stephanie are bathing him, getting Michelle's eye painted black from looking into a kaleidoscope, and putting green hair dye in Danny's shampoo. It's learned the motivation of the pranks is to turn Danny away from Cindy, hoping his parents will get back together. At the end of the episode, D.J. and Stephanie turn the tables on him, as he falls victim to one of their pranks. Rusty also causes a major commotion with a love letter he types (as he is inspired and intrigued by D.J.'s crush on Ricky, the paper boy). He intends for her to receive it, and thinks it came from Ricky. However, since he did not write "Dear D.J.", or address it to anyone, and simply signed it "Hot for You", it got around to everyone in the Tanner household from someone else, leading to pandemonium, until Michelle rats Rusty out, and he takes off with everyone else chasing after him.
Rusty appears in only two more episodes, including: "Happy New Year" (in which Stephanie actually kisses him, after he keeps saying he will, and he turns out to have been lying) and "Stephanie Plays the Field", in which he's on Danny's Little League Baseball team. He comes up with the name for the Tanner Twister.