Mimi is an antagonist in the Mermaid Melody series and the younger sister of Sheshe. Mimi is a mercenary of Gaito, and not in love with Gaito like the Dark Lovers; she is more of a follower of Sheshe, and in their song, she sings the chorus. Their song causes pain to mermaids.

Spoiler

Like her sister, Mimi is also transformed by Gaito's spell, and her true form is a blue demon anglerfish. In the anime she becomes friends with the Mermaid Princesses, and cries when she finds out her friends are the Mermaid Princesses.