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Seine
Miyazaki Seine

Miyazaki seine is the main protagonist in the manga. She is an immortal (316 years old) girl who Tatsuya invites to live in his home; before that she lived in a cardboard box in a park. In the first chapter, Seine looks like a masochist because she likes being bullied. In truth, she becomes close to people who are infected by "mushis" (a kind of parasitic, mind-controlling bugs, to order to hunt them. Her hunting ways go against the kind and pacifist Tatsuya's beliefs. Her motive is to avenge Shimon's (her foster father) death by kidding the mermaids from the sea. She controls a black snake like thing called "Aion" that lives inside her. Her weakness is her inability to swim. In the early chapters, Tatsuya calls her "Miyazaki-san". After she moved in, she told him to call her "Seine" because it merely sounds like her real name; means that "Miyazaki" is just made up and she does not really react to it when other people call her that.


History

Seine is born in America on the 17th century. Many years ago, when she was still 4 years old, her biological father sold her to another man who had done many terrible things to her, e.g. trying to drown her, beating her with a stick, ordering her to steal some goods for him etc. she loves loves (or has a father complex) to a man named Simon who adopted her when she was still 4 years old. Simon then ask Seine if she wants to come with him (adopted her). Seine decides to go with him and he became her "foster" father.


Appearance

Seine is 15 years old (her outer appearance). She has seaweed coloured hair with yellow eyes. As Nagisa (Tatsuya's childhood friend) mentioned, it is shown that she is quite skinny. Besides the uniform she wears in school, she is mostly seen wearing Tatsuya's vests and underwear at home (Tatsuya (embarrassed) sees this as a big problem and kept telling her to stop).


Relationships

Tatsuya- Seine was "saved" by Tatsuya while she was bullied by two other girls (classmates). It is unclear if she has any feelings for him.


"Akuma" Twins:

Shizuki- She is the one who gave both Shimon and Seine immortal bodies. It seems that Seine cannot get along with her; sometimes calling Shizuki a "demon". Seine sometimes calls her a pervert.

Yuzuki- When Seine is younger, Yuzuki kissed Seine on the lips when they first met. She kept on chasing Seine until she cried (she is probably affraid of Yuzuki at that time). Seine once warned Tatsuya's cousin to not go in the house yet (since Yuzuki is interested in young children), but it was too late since Yuzuki already kissed her. After that, Seine saved Tatsuya's cousin by bashing Yuzuki's head.

Trivia

- seine enjoys sleeping in boxes

-it has seemed she has killed two mermaids

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