Recurring
Kai Banks (voiced by Cooper Andrews) is Hailey's Hawaiian father.
Patricia Banks (née Phlorange) (voiced by Julie Bowen) is Hailey's Caucasian mother. She is a realtor but was once a breakdancer in music videos.
A.C. Aychvak (voiced by Josh Brener) is Hailey's rival, although the rivalry is mostly one-sided. He is spoiled and willing to cheat to win, sometimes with the aid of small robots. His catchphrase is "What the beans?"
The Professor (voiced by Sarah Chalke) is a mysterious, unnamed scientist from the future.
Rebecca "Becker" Denoga (voiced by Judy Alice Lee) is Scott's troublemaking, tomboyish, and destructive younger sister. She initially develops a crush on Hailey but is able to move on from it when Hailey doesn't reciprocate any feelings for her. She later begins a relationship with her former school rival, Kennedy.
Bonesaw, Buzzsaw (voiced by Nik Shriner), Chainsaw (voiced by Kyle S. More), and Paul (voiced by Billy Kametz and Eric Bauza) are Becker's friends.
Kristine Sanchez (voiced by Amanda Leighton) is a popular girl who, despite being somewhat self-absorbed, is very cheerful and friendly to everyone and attends the same school as Hailey and Scott. She is a fashionista who specializes in hats. While Hailey has been shown to dislike Kristine's overly cheerful personality at first, she does start to open up to her in the episode "Road Trippin'." In "The Beginning of the Friend," Kristine begins to date Scott. However, she later breaks up with him in the episode "U.F. Whoa!".
Sunny Denoga (voiced by Joy Osmanski) is Scott and Becker's mother.
Thad (voiced by Nik Dodani) is one of Hailey's classmates and in a relationship with Jonathan.
Jonathan (voiced by Nico Santos) is one of Hailey's classmates and in a relationship with Thad.
Dwayne and Johnson Banks are Hailey's twin baby brothers. Their names are a reference to Dwayne Johnson, who co-starred with Hailey's voice actress Auliʻi Cravalho in the Disney film Moana.
Frank (vocal effects by Dee Bradley Baker) is the Banks' pet flamingo. He is in a relationship with Scott's pet peacock, Petey.
Lucy (voiced by Sydney Mikayla) is Hailey's clumsy classmate.
Kennedy (voiced by Shara Kirby) is Becker's perfectionist girlfriend and former school rival.
Bill Board (voiced by Carlos Alazraqui) is a local businessman who appears in several episodes. He runs a company that puts up billboards, appropriately to his name, and has also acquired several other local companies (often in bets or games with other businesspeople).
Genesis (voiced by Erica Lindbeck) is Hailey's popular classmate.
