Meroune Lorelei du Neptune, often shortened to "Mero," is a mermaid who becomes a resident of Kimihito Kurusu's home. Despite being the fourth girl to officially move in, she is technically the fifth if you count Suu.

Mero is known for her cheerful and energetic personality. Despite being a mermaid and limited to aquatic environments, she's determined and spirited. Her unique appearance and bubbly nature make her a fan favorite.

Appeance and Personality

Credits: IMDB 

Meroune is a tall, attractive mermaid with striking blue eyes. Her long, light pink hair is styled in unique, curled strands. As a mermaid, she has a pink fishtail instead of legs and possesses gills for underwater breathing.

Meroune typically wears a Gothic Lolita outfit in public, complete with a seashell-adorned barrette and a dress covering her tail. When at home or in the water, she prefers a bikini.

Meroune is unable to walk due to her mermaid tail, so she uses a wheelchair. She relies on others, like Kimihito or the other girls, to push her around. Her mother recently bought her a motorized wheelchair, but Meroune prefers the manual one.

Powers and Abilities

Credits: Know Your Meme 

• Aquatic Adaptation: As a mermaid, she excels at swimming and can breathe underwater.
• Herbal Knowledge: Mero is skilled in mermaid medicine, understanding the healing properties of various aquatic plants.
• Marine Biology: Her underwater life has given her extensive knowledge of marine life, though her expertise is primarily focused on fish.
• Vocal Talent: Meroune possesses a beautiful singing voice that is capable of enchanting listeners.
• Cold Resistance: Due to her aquatic origins, she is resistant to cold temperatures but not immune to extreme cold.
• Water Sensing: Meroune has a unique ability to sense water, even within living beings.

Trivia

• Meroune's name is derived from "Mermaid."
• She was the first girl to kiss Kimihito, albeit through CPR.
• Kimihito can easily recognize changes in Meroune's voice due to frequent interaction.
• Meroune shows signs of masochistic tendencies, with dreams of unrequited love or being a victim in an NTR situation.
• She was later revealed as a princess.