Santoni Kathy Santoni (portrayed 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. Harry Takayama Harry Takayama (portrayed 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. Derek S. Boyd Derek S. Boyd (portrayed by Blake McIver Ewing) is one of Michelle's friends (appearing in eight episodes total throughout seasons six through eight). Michelle first meets Derek in the episode "The Play's the Thing," when he lands the role of Yankee Doodle in their school play, America the Beautiful. Though Michelle is initially jealous of Derek for winning the part over her (due in no small part to the fact that both of her sisters played Yankee Doodle in the same play), she helps him recover from a case of stage-fright, and they eventually become friends. Derek is very educated and well-spoken for a boy of his age, though also a bit on the wimpy side. He also shows signs of being a bit obsessive-compulsive. As shown in several episodes (including in his first appearance), he is also shown to be a very talented singer. In the scene in which he