<Li> Kathy Santoni (played by Anne Marie McEvoy) is a classmate of D.J.'s . While only appearing in four episodes (beginning with season three's "Back to School Blues"), Kathy Santoni is mentioned in several episodes by various characters . In the season seven episode "The Apartment," it is revealed that she got married and pregnant at age 16 . Kathy shows up to her 20th high school reunion in Fuller House . </Li> <Li> Walter F. Berman (played by Whitby Hertford) is a school friend of Stephanie Tanner . At first, Stephanie disliked him, and went as far as teasing and imitating his resemblance to a duck (which occurs when his lips are pursed). She--along with the rest of the class--even nicknamed him "Duckface". However, after following her Uncle Jesse's advice, she learned to appreciate Walter more, even if he was a nerd . This led to Walter briefly considering Stephanie as his "secret girlfriend". </Li> <Li> Harry Takayama (played by Nathan Nishiguchi in Full House; Michael Sun Lee in Fuller House) is the first on - screen friend of Stephanie's (appearing in season two, beginning with the episode "Middle Age Crazy"). He usually calls her "Chief", and she refers to him as her boyfriend--without understanding that term's full meaning (as Stephanie put it in Harry's first appearance, "you're a boy, and you're my friend; that makes you my boyfriend"). Stephanie decides to have a pretend wedding with Harry in "Middle Age Crazy," feeling that she is not receiving attention from the rest of the family . His last appearance is in the season three episode "Nerd For a Day". In the episode "Pal Joey," Harry becomes infatuated with D.J. after she teaches him a mathematic problem using oranges . Over the years him and Stephanie stayed in touch, and she jokingly refers to him as her "husband". In Fuller House, when a thousand roses showed up to the house, Stephanie wonders if Harry sent them . Turns out he didn't send them and is actually getting married . </Li> <Li> Cindy (played by Debra Sandlund) is a girlfriend of Danny's, appearing in three episodes during season four, beginning with the episode "Terror in Tanner Town". It is revealed that she works as a dry cleaner in that episode, and she first met Danny when he comes to the store as a customer . She also has a precocious and troublesome 10 - year - old son named Rusty . </Li>

Who played stephanie tanner's boyfriend on fuller house