Coralia has long red hair with coral streaks tied up into a ponytail with coral and pink strands. Her eyes are orange and her makeup is light green. Coralia's outfit is very simple as it is comprised mainly of a green bra with pink ruffles and straps in coral branches. She has a long green tail with glittery ruffled fins and three bright green stripes on her waist. Her wings are yellow and shaped somewhat like shells.
Coralia is a very gentle and sweet mermaid. She is very fearful and shy.
Coralia is captured by Valtor, along with Amarea and Talassia. Valtor places his mark on them; stealing their magic and changing them into sea monsters attacked anything that crossed their paths. After Valtor's defeat, Coralia's magic returned and she became a mermaid again.
Coralia appears again in "The Enchanted Island," as the Guardian of Tir Nan Og took the form of three mermaids from Andros: her alongside Talassia and Nerimer. The fake Coralia lured Aisha out into the water and pushed Aisha underwater after she introduced herself.