Mermaid Fairilu (マーメイドフェアリル Māmeido Feariru?) is one of the several species of the Fairilus. They consists mostly of mermaid Fairies, featuring typical mermaid aquatic tails. Their motifs are based around aquatic life of sea animals and ocean fauna.
Majestic, these are the known Fairilus with the characteristics to live underwater. They are serene, calm, and refined Fairilus. Mermaid Fairilus are also the masters of water-based Fairilu Magic. Their native home is the Mermaid Fairilu's Sea, the only known continental ocean in Little Fairilu.