Teddy R.Duncan (Bridgit Mendler) is the protagonist of the series and Charlie's older and only sister. Feeling that she will not be around as much when her baby sister Charlie is grown, she produces and directs video diaries for her, hoping that it will give her advice that will help her be successful as a teenager. Her best friend is Ivy Wentz. She is usually a straight A student. It was mentioned in "Sun Show part 1" that her parents were expecting a boy, despite her usually boyish name "Teddy". She dated Spencer Walsh in season one but they broke up after she caught him hanging around with a pretty, dim-witted brunette named Skyler, breaking her heart. She and Skyler later become friends despite Teddy and Ivy being annoyed by her at times because of her dumbness but they get used to it, as it is her nature. She and Skyler also compete in a Battle of the Bands contest, but when Skyler and PJ get together, they combine the two bands together, winning the contest. She and Spencer later get back together in season two, where Spencer kisses her and says that hurting her was the stupidest thing he's ever done. Throughout the show Teddy has had numerous boyfriends including Derek, a very relaxed guy with a motorbike who has not much interest in Teddy, and Evan, a boy that Teddy once liked until she realized that he was into Pokio a little kids card game and dumps him because of this in a larp (live-action role play) in the park. Teddy shows a lot of care towards her brothers, as demonstrated when she saves PJ from falling out of a tree house window on the condition of him needing to drive her where ever she wanted for a month, or when Gabe gets a black eye from Jo and Teddy offers to help him with his problem. Teddy is known as a "goody-goody" (GG) from her best friend Ivy. It is revealed in "Bye Bye Video Diary", that the reason she wants Charlie to have video diaries with advice in them because she wants Charlie to grow up a good girl.
PJ
Duncan (Jason Dolley) is the oldest of the Duncan siblings. He
and Teddy often fight, although they care about each other, and he usually gets
along well with his younger brother, Gabe. He often appears awkward,
absent-minded and childish, but has shown on numerous occasions to be
resourceful, creative and intelligent. Also, he has also been shown to be a
good cook. He and his best friend, Emmett, have their own band entitled
"PJ and the Vibe". PJ occasionally uses his younger sister, Charlie,
for his personal gain like in when he uses her to make big tips by saying that
his Amy was ill in the hospital when really she works there. He dated Teddy's
friend and ex-girlfriend of Spencer Walsh, Skyler, who has the same type of
scatterbrain he has, but they broke up in "PJ in the City" when
Skyler had to move to New York because of her father's new job. When he dated
Skyler, he became concerned when her ex-boyfriend kept texting her to get back
together, he tells him to leave Skyler alone. He was originally supposed to be
named after his great-grandfather Patrick John, but Bob was nervous when
writing on his birth certificate, resulting in the legal name "Potty
John" instead, which was changed to "PP" John in season 2.
Gabriel "Gabe"
Duncan (Bradley Steven Perry) is the younger brother of Teddy and PJ and
older brother of Charlie. It is demonstrated early in the series that Gabe does
not approve of Charlie's arrival and takes the longest, of all the Duncans, to
get used to her. However, he often reluctantly assists with taking care of his
younger sister and is gradually beginning to demonstrate more fondness of her.
He is a prankster, and a troublemaker, often sarcastic and lazy, but can also
be dutiful and determined at times. He is front-man when it comes to the
Duncans' running rivalry with Mrs. Dabney, the Duncans' neighbor, who is often
the target of Gabe's pranks and cracks, which is the only time the family
doesn't mind them. He is the only Duncan to have short brown hair, unlike the
rest of his family, who are blond. One time he has been in a commercial with a
fake mom where he claims "she looks more like my mom than my real
one." A running gag in the show is that he insults his father because of
his weight and baldness, his mother's cooking, PJ being a goofball, Teddy being
a "goody-goody", and occasionally Charlie. Whenever there is a
special occasion, he wants to skip the ceremony and get to the cake.
