Nefazia

Nefazia appears in the book Nefazia Visits the Palace by Suzanne Weyn.

Biography
Nefazia is a mermaid Queen of the Indian Ocean. She shows up at Triton's palace, and the princesses are enchanted, until they begin to believe that she's come to marry their father.

Aquata convinces her sisters that having a stepmother around would ruin their lives, so she comes up with a plan that will drive Nefazia away forever. But Ariel thinks Nefazia would make a terrific stepmother, and attempts to stop Aquata's plan.