Meroune Lorelei, often called 'Mero', is a mermaid and one of the main supporting characters in the anime and manga series Monster Musume no Iru Nichijou. She is a member of Kimihito Kurusu's household, participating in the interspecies cultural exchange program. Mero is elegant and refined, with a fascination for tragic romance inspired by fairy tales. Despite her delicate appearance, she has a playful attitude and supports her friends, often acting as a wise and calming influence in the group.