Vicky Larson

Vicky an Danny met and got together while Vicky was filling in on 'Wake up, San Fransisco' for Becky, while she was on maternity leave. Danny insists that she take a job in Chicago doing the news that she's been offered once Becky returns, and that starts a long-distance relationship that goes from early season 6 to midseason 7, and which includes their engagement in the Disney World episode at the end of season 6. However, Vicky gets her dream job - anchoring the news in New York - and so she cannot come to San Francisco to stay, nor would Danny pull up all his roots with his family in California. Therefore, they break up.

Anyway, Vicky is a really nice woman who gives good advice to D.J.'s relationship with Steve and helping Danny to deal with it. She also acts like a mother toward Michelle. So she would have made a nice mother, and one can even imagine that she has some of the same qualities as Pam did. But however, her career came first.

Pam Katsopolis-Tanner

Pam was the girls' mother, Jesse's sister and Danny's wife. She was never seen in the series, except in the episode 'Goodbye, Mr.Bear' where she appeared in the form of a home video when she and Danny brought Michelle home from the hospital. She was killed by a drunk driver, that came over in the wrong lane, before the series began. She has been described as happy, always smiling, overexcitable, very kind and sweet, and unpunctual.

Nick Katsopolis

Nick is the girls grandfather, and Jesse and Pam's father. He is a very hot-headed and tempered guy, and that gets him in trouble as we see a few times on the show ("it's not my job" & "fogged in"). He also pushes Jesse into taking the first step towards Becky. He also loves his grand daughters very much and is a very loving grandfather to the girls.

Irene Katsopolis

Irene is the girls grandmother, and Jesse and Pam's mother. She is a very loving and caring grandmother, who also has a lot of humor and witt. And a very head strong woman. She also shows a few times that she has a lot of dignity. We also learn that she has started night school to finish college. Also a funny bit she does is the fact that she still thinks of Jesse as her little boy sometimes, and his little tuchie.

Gia Mahan

At first Gia and Stephanie was enemies, but they later becomes best friends. Gia might be considered Stephanie's Kimmy. Just as D.J. let Kimmy lead her a little bit astray at times, Stephanie got involved in a small number of wild, irresponsible things because of Gia, such as joyriding with strange boys and a make-out party Gia hosted when her mother wasn't around. After her parents had been through a divorce, Gia is shown as a smoking, rebellious girl with horrible grades. She is possibly two or three years older than Stephanie, being held back a few years. But because of Stephanies good influence on her we learn early in season 8, that because of Stephanie, Gia had stopped smoking, become more respectful to her mother, and had improved her grades. Gia is a leader in some ways, as well. She and Stephanie put together an band with Kimmy and a girl in their class, that failed miserably because the girls paid more attention to their appearance than to rehearsing.

Teddy

Teddy is Michelle's first best friend. He made his debut on the first day of kindergarden, when Joey told Michelle that the best way to make new friends was by being funny, and doing a Bullwinkle impression. He accompanies her when she needs a buddy to sneak out and see Danny with when he goes on a date with Vicky in mid-season 5. He is also the one Michelle runs away to once later that season. He moves away in "The Long Goodbye," but when his dad's job moves him back to the area, he returns. He is the typical best friend a child that age would have, and he and Michelle even consider trying to be boyfriend and girlfriend in third grade. However, they try too hard, and find out it's no fun for children their age. So, they go back to just being best friends.

Denise Frazer

Denise is Michelle's sort of 'second' bestfriend. She is a girl with a lot of guts and a lot of attitude. It's a little mistake on the show, but they actually meet for the first time twice. First time at the 'Ranger Joe Show' in the episode 'Girls will be boys', but then they meet again in the episode 'The long goodbye', where Teddy reveals to Michelle he's moving to Amarillo, Texas. After then, Michelle and Denise becomes best friends, and between the two of them they come up with all sort of stuff like; protesting against a makebelieve figure that weezels them for their money, a makebelieve mariage between Michelle and Steve, summer camp, making expencive phonecalls to joke central 'funny buddy', driving in a car race, plus other really crazy stuff. But then late in season 7, Teddy moves back, and both Denise and Teddy tries really hard to both be Michelle's best friend. But at the end, they decide to be best friends all three of them.

Aaron Bailey

Aaron is the typical class bully, who acts quite annoying and rude at times. He pinches Michelle in one episode (pinch for a pinch), while they are in preschool. While that behavior doesn't continue, his obnoxious ways are implied to continue through the series. Indeed, Danny remarks in an early 7th season episode that they are watching Aaron for several days "until his regular babysitter stops twitching."..no need to say more...

Lisa becomes Michelle's friend in the last season. She is a very head-strong girl, who likes to get things her way. Therefore she is also very bossy. In the episode 'Dateless in San Fransisco' she is the one that comes up with the idea that everyone should have dates for the Valentines Dance.

Derek S. Boyd

Derek is one of Michelle's friends and appeared in several episodes throughout Seasons 6-8. Michelle first meets Derek in the episode "The Play's The Thing", when he beats her out for the role of Yankee Doodle in their class's play "America The Beautiful". Though Michelle is at first jealous of Derek for winning the part over her, she helps him recover from stage fright and they become friends. Derek is very educated and well-spoken for a boy of his age, though also a bit on the wimpy side and shows signs of being a bit obsessive-compulsive as well. As shown in several episodes, he was a very talented singer as well.

Nelson Burkehead

Nelson was a very wealthy person, who during season 8, dated D.J. on and off for a few episodes. Or as Stephanie describes it: "You two should be attached to the clapper!!". Nelson and D.J's new boyfriend Viper fights over her in the episode called "D.J's Chioce", which ends up with D.J picking neither of them.
Not much is revealed about Nelson's background or family aside from the fact that he is very rich and often throws parties on yachts. Though towards the end of Season 8, he reveals to have a cousin named Regina visiting in town from England, whom he sets Joey up with on a date.

Viper

Viper appears in season 8 as the young guitar player in Jesse's new band "Hot Daddy and the Monkey Puppets". D.J. and Viper first meet when Jesse holds auditions for guitarists for the new band. They hit it off and begin to date, much to the chagrin of Jesse, who sees a little bit too much of himself in the young and wild Viper. And especially Danny, who is convinced that Viper is nothing more than a wild, uncontrollable, long-haired rock-and-roller. Eventually both Jesse and Danny learn to accept Viper, and he and D.J. date for a few episodes. Viper's last appearance on the show was in "D.J's Choice", where he breaks up with D.J., only to want her back a few days later, though he then finds out that she has started dating Nelson again. At the end of the episode, Viper and Nelson are so busy competing with each other to try to win D.J. that she decides she wants to date neither of them.

Harry is Stephanies friend throughout season 2. They play around and messes up in DJ's stuff, and also in their room at times, wich she does not approve of. Harry has a very special nickname for Steph, wich is 'Cheaf'. In the episode "Middle age crazy", Stephanie and Harry has a pretend wedding.