Main •
Ariel (voiced by
Mykal-Michelle Harris) is an 8-year-old mermaid princess of the underwater kingdom of Atlantica. •
King Triton (voiced by
Taye Diggs as an adult, Jeremiah Felder as a child) is Ariel's father, Ursula's brother and the king of Atlantica. As a kid, he had the nickname Tri-Tri. •
Ursula (voiced by
Amber Riley), a
sea witch, Triton's younger sister and Ariel's paternal aunt. Unlike the films, Ursula is not antagonistic and has been nicknamed "Tauntie" by Ariel. • Ebb and Flo, Ursula's pet moray eels • Lucia (voiced by Elizabeth Phoenix Caro) is Ariel's friend who is learning to do magic. • Fernie (voiced by Cruz Flateau) is Ariel's friend who loves learning about animals. •
Flounder (voiced by Gracen Newton) is a fish who is Ariel's friend. • Akiko (voiced by
Kai Zen) is a mermaid who lives in the Crystal World.
Recurring •
Sebastian (voiced by
Kevin Michael Richardson) is a crab, who is the royal composer and one of Ariel's friends. Richardson reprises his role from the
Kingdom Hearts video games. • Ravi (voiced by
Parvesh Cheena) • Ayanna (voiced by Dana Heath) is Alanna's twin sister and Ariel's older sister. • Alanna (voiced by Jessica Mikayla) is Ayanna's twin sister and Ariel's older sister. • Hermes (voiced by
Gary Anthony Williams) • Jewels (voiced by Amari McCoy) is Ariel, Alanna, and Ayanna's cousin. • Cristina Cuttles (voiced by
Alanna Ubach) • Clamila (voiced by Somali Rose) • Delfino (voiced by
Ron Funches) • Navi (voiced by
Melissa Villaseñor) • Bembe (voiced by Madelyn Skyler Tee) • Wahoo Fish (voiced by Gary Anthony Williams) • Tantie Chantale (voiced by
Danni Washington) is Triton and Ursula's sister and a marine biologist. As a kid, she had the nickname Chanty. • Remy (voiced by Ryan Lopez) • Sanka (voiced by
Carlos Alazraqui) • Ronaldo (voiced by Ayush Rajmachikar) • Sea Bunnies (voiced by Steve Moore) • Aquatica (voiced by
Yvette Nicole Brown) • Calamar (voiced by Hunter Corleto) • Axyl (voiced by Martin Wichmann Andersen) is Akiko's pet crystal axolotl.
Guest • Squid (voiced by
Parvesh Cheena) • Duke of Clownfish (voiced by
Jeff Bennett) • Revi (voiced by
Rizwan Manji) • Kite Monster (voiced by
Kevin Michael Richardson) • Gabi Guppy (voiced by Abril Bellido) • Mer-Mom (voiced by
Grey DeLisle) • Gigi Guppy (voiced by Emma Rodriguez) • Marla (voiced by
Alanna Ubach) •
Santa Mer-Claus (voiced by Kevin Michael Richardson) • Atlanticans (voiced by
Gary Anthony Williams & Grey DeLisle) • Abuelita Alma (voiced by Grey DeLisle) • Park Attendant (voiced by Jeff Bennett) • Montez (voiced by Kevin Michael Richardson) • Nana Xola (voiced by
Jenifer Lewis) • Voice of Manners (voiced by
Yvette Nicole Brown) • Chef Louis (voiced by Yanic Truesdale) • Sheila (voiced by Grey DeLisle) • Duchess of Mariana (voiced by Kimberly Harris) • Akiko's Mom (voiced by Yvette Nicole Brown) • Clams (voiced by Jeff Bennett & Grey DeLisle) • Mer-Kid (voiced by Ayush Rajmachikar) • Crab (voiced by Grey DeLisle) • Serena Shrimply (voiced by Grey DeLisle) • Marcel Mahi-Mahi (voiced by John Eric Bentley) is an acrobat fish who, alongside his brother Maurice, is a part of The Marvelous Mahi-Mahi Brothers show. • Chuckster the Clownfish (voiced by TBA) • Merman (voiced by
Eric Bauza) • Manuel (voiced by Nicolas Roye) is a manatee. • Lion Fish (voiced by TBA) • Parrot Fish (voiced by Carlos Alazraqui) • Merfolk (voiced by Kimberly J. Harris) • Mirlande (voiced by Vasthy Mompoint) • Audra (voiced by Lucia Arguedas) • Delroy (voiced by Preston Best) is a pufferfish. • Marina Neptina (voiced by
Jodi Benson) • Additional Voices (voiced by Alanna Ubach) • Car (voiced by Hunter Phillip Corleto) • Croque Monsieur (voiced by Nich Peltz) ==Episodes==