

London Tipton, portrayed by Brenda Song, is the socialite of the four main teenage characters.Also, in 'A London Carol', a future version of Cody and Bailey are married. In 'Das Boots', it is revealed that he has multiple allergies, said by Sasha, a Russian girl who lost to him in a chess championship. However, near the end of the third season, they get back together again after confessing that they never stopped loving each other. At the end of season one, Cody begins dating Bailey Pickett, but they pause their romantic relationship in the second-season finale due to a misunderstanding in Paris. Likewise, Cody cares very deeply for Zack, despite his picking on him constantly. Cody is usually picked on by Zack, but Zack becomes very defensive when other people do it. Cody has been noted to be ten minutes younger than Zack and often plays into Zack's crazy schemes. Cody performs well academically, is a straight A student, and has shown to have a great interest in academics however, he does not perform well in sports. Cody Martin, portrayed by Cole Sprouse, is typically the intelligent, kind-hearted, and sensitive twin.She breaks up with him in the episode 'Graduation on Deck' because of a Peace Corps assignment she accepts, but they remain close friends. Although initially there is confusion as to whether he loved her or whether he was just taking her on as a challenge, he proves to have strong feelings for her in later episodes. He then surprises his friends by being a good boyfriend. At first, she refuses to go out with him since he was a 'player,' but eventually he wins her over by throwing a surprise party for her. At the beginning of the third season, he starts to develop strong feelings for a new student on the ship named Maya. He flirts with most of the girls on the ship by using various pick-up lines, although he rarely ever stays with them for more than one episode.

Zack acts selfish at times but he also sincerely cares for his brother and friends, even if he does not always show it. He performs very well physically and enjoys physical sports, especially basketball and football. Zack does not perform particularly well academically, but he manages to graduate in the series' finale episode. Cody is forced to obtain the job as a towel boy. He works in the juice bar on the ship as a result of using up both Cody's and his money for the semester. Zack Martin, portrayed by Dylan Sprouse, is typically the fun-loving, rebellious, and immature twin.
