Brooklyn (Barbie) (voice)

Tatiana Varria

Malibu

America Young

Skipper (voice)

Kirsten Day

Stacie / Mermaid 1 (voice)

Cassandra Lee Morris

Chelsea (voice)

Natalie Lashkari

Marlo

Melanie Minichino

Aquaryah Aquavilla (voice)

Madelyn Kratzer

Talleigha Fishtail (voice)

Tiana Camacho

Isla / Dr. Tang (voice)

Vivian Lu

Finn

Johnny Yong Bosch

Sareena Seasquid

Cassidy Naber

Coralia / Angler Fish (voice)

Angela Lee Sloan

Oslo

Jabez Zuniga