Meroune Lorelei

Meroune Lorelei, or Mero for short, is a mermaid bound to a wheelchair. While she is the the fourth girl to officially move in with Kurusu, she is technically the fifth girl to move in with him.

Appearance
Being one of the sea dweller and one of the iconic sea creature, rather than legs she has a pink fish-tail, she has webbed hands, and fin-like ears. She wears a maid's outfit, with her barrette having seashell designs on both sides. Her tail is usually covered with her dress

Personality
Mero has a very warm personality. According to Centorea, she gets a vibe of royalty from her.

As a young girl she had a fascination with the "tragic love" story of Hans Christian Anderson's The Little Mermaid, and wants to experience it in real life, even up the point of turning into sea foam.

She loves to be a victim of tragedy in general, whether it's unrequited love, her lover dying, or herself dying and leaving her lover behind. Miia even calls her a "tragedy freak." However, after seeing Miia and Kimihto have an intimate moment, Mero started to realize her fantasy may not be so fulfilling in real life.

It is implied that she is a masochist, since after eating some of Miia's cooking, it brought to mind her fins painfully splitting apart into legs. Afterwards, she is seen collapsed on the floor smiling about it, despite foaming at the mouth.

Skills and Traits
She is naturally an adept swimmer, and can sense water from great distances--quite possibly the water inside people as well, since she had Kurusu avoid the escorts that were pursuing her without Kurusu noticing.

Her body secretes a slime to keep her skin moist, which can sometimes attract Suu when she's nearby. Because of this, she has to wear special clothing that doesn't easily slide off.

Because Mermaid's natural homes at the bottom of the ocean are very cold, Meroune is resistant against cold temperatures.

She is also very knowledgeable about marine life.

Plot
Wheelchair-bound due to her lower-half being a tail, she first met Kurusu when she lost control of it and he saved her. After she helped him find the other girls, it was revealed that Ms. Smith had a waterproof room built in Kurusu's house for her.

Later on, Kimihito made several changes to the house to make her comfortable, this however, spiked Miia's jealousy, causing her to go through extreme lengths to get his attention. Later on, she had a calm talk with Miia, who revealed that Miia saw her as a rival for Kurusu's affection, only for her to reveal that she wanted anyone but herself to be with Kurusu.

When Kurusu becomes ill, Meroune at first reveled in the tragedy, later on when Suu was channels her, she attempt's to have Kurusu soak in water laced with medicinal herbs, witch was a traditional mermaid cure. However Kimihito refused when he was told the process would take a whole week.

Trivia

 * She is the second among three Monster Girls to have a known last name, the first being Centorea Shianus, The third being Rachnera Arachnera.
 * Like the other girls, her name is derived from her species name: "Meroune" from Mermaid.
 * Meroune's last name, Lorelei, also refers to a famous siren from German folklore, which also has themes of tragic romance.
 * Her attire, which is a maid's, is a pun on her species: Mermaid.
 * Meroune seems to have some sort of a masochistic side to her. Her dreams of having an unrequited love or the victim in an NTR situation and the small smile she had after tasting Miia's cooking seem to support this.