Miia

Miia is the main female protagonist of the story. She is a Lamia (Snake Girl) who has been placed with Kurusu as part of the "Cultural Exchange Between Species Bill", she later falls in love with him after staying with him, to the point of wanting to "do it" with him. She always refers to him as "Darling (ダーリン Darlin)" even when speaking to others about him.

Appearance
She has long bright reddish-pink hair, pointed ears and a long snake-tail of the same color. Her eyes are Amber with slitted snake pupils, a normal trait for lamiae, though it becomes much more prominent when she's mad or under the effects of a full moon. She has a very long tongue and is also seen with small fangs on occasion. The length of her tail can vary from 6 to 7 feet to 20 feet.

Personality
She is incredibly enthusiastic about the smallest things and has a very bubbly and slightly child-like nature. She is also very flirtatious, trying to seduce Kurusu on multiple occasions. When Kurusu told her and Cera to think of Suu as a child, she briefly thought of having children with him. Under the effects of a full moon, she was even willing to allow Centorea and Papi join in while having sex with him.

However, despite her naturally cheerful demenor, Miia is not as emotionally mature as she would appear. She has, on a few rare occasions, become upset and angry at other people to the point of almost striking them with her tail, and when Papi and Centaurea move in she became a little more clingy and jealous.

Skills and Traits
Due to being half-snake, she is naturally skilled at climbing trees. Since she is part reptile, she is also a poikilothermic..The tip of her tail is shown to be very sensitive.

At a certain time, like a normal snake, she starts shedding her skin, which according to her, is more embarrassing then being seen naked.

She is also strong enough to crush metal pipes without noticing when under the effect of a Full Moon.

Plot
Miia is placed with Kurusu as part of the "Cultural Exchange Between Species Bill" by Sumike, despite his not actually being a part of the program. At first she thought that he would be afraid of her, since she was half-snake. However his kindness and effort put into making sure she was happy--to the point of remodeling many parts of his home for her convenience--quickly impressed her.

As time passed, Miia eventually fell in love with him. Although Kurusu seems to feel the same way, there is a stipulation in the exchange program that prohibits interbreeding between humans and beast creatures. Violating this law would result in Kurusu being severely punished. This doesn't stop Miia from making advances on him whenever she gets the chance.

Later on when Papi became a resident of the house, at first Miia thought she was just a child and didn't believe she had to worry about any competition, however upon finding out that Papi was as old as she is, she quickly changed her attitude and warned Papi to "keep her hands off him".

Later, Cerea became the 3rd resident of the house, much to Miia's dismay. She tried to assert her dominance over the group by claiming that as the 1st resident of the house, only for a fight to break out between the 3 in the park, Ms.Smith quickly got involved and tried shooting them with her tranquilizer gun, only for Kurusu to take all 3 shot's thinking it was a real gun. Miia and the others later apologized for their behavior.

At one point she tried to cook for Kurusu, only for her skin to start shedding, much to her embarrassment, Kurusu was forced to peel it off for her, she tried to award him with her food, only to find out that it made Papi and Cera very sick due to her simply guessing on how to make it instead of reading a cookbook. Later on, Kurusu started teaching her how cook properly, only for them to be interrupted by a Slime Girl springing out of the pot, temporarily knocking her out. After Kurusu reverted her to a more harmless state, she, Cera, and Kurusu were left puzzled on what to do with her.

Later on, the Slime Girl (Now named Suu) continued to cause trouble around the house, accidentally adsorbing many objects around the house and getting slime everywhere, much to their dismay. While the two of them are angry at her, they are surprised when Suu slowly learns to talk. They then start talking about bringing her to Ms. Smith, however when Miia points out that Suu probably didn't come here legally and she could be put in prison, Papi quickly leaves with her, Miia and Cera try to go after her but are stopped by the arrival of Ms. Smith.

Later on Miia talks with Kurusu on the phone about Suu staying with them. At first she and Cera are hesitant about Suu staying. They quickly change their minds when Kurusu tells them to think of her as a child, with Miia even thinking of a having a baby with Kurusu someday, however when Kurusu got home, Miia told him a little too late that Ms. Smith had arrived....

Almost immediately Miia, Cera, and Papi started panicking over what Ms. Smith would do to Suu, however Kurusu was too busy with the remodeling of his home to pay attention. Despite him thinking the remodeling was for Suu, the 3 of them took her and hid in the park, all the while hiding from what they thought were Smith's "minion's" (in reality they were Meroune's guard's).

Trivia

 * Her name is derived from her species name: "Miia" from Lamia
 * The way she refers to Kurusu as "'Darling (ダーリン, Darling)" is very similar to how Lum refers to Ataru in Urusei Yatsura.
 * The tip of Miia's tail is very sensitive, much like Lala from LOVEる.