Eiko Aizawa

A girl who works at the Lemon Beach House alongside her older sister. After [Ika](https://anilist.co/character/20512/Ika-Musume) fails to invade the surface, she forces them to work for her to pay off a part of the wall she destroyed. She is the younger sister to [Chizuru Aizawa](https://anilist.co/character/34654/Chizuru-Aizawa) and older sister to [Takeru Aizawa](https://anilist.co/character/37242/Takeru-Aizawa). She is typically the one who is the most annoyed by Squid Girl's antics, getting easily frustrated with them and not showing much concern for her well-being or safety.