![Hii-chan](https://img.flawlessfiles.com/_r/400x400/100/ce/29/ce2913cc4bd74bc05d581241b6fdf21d/ce2913cc4bd74bc05d581241b6fdf21d.jpg)
Hii-chan
ひぃちゃん
An innocent mermaid who also speaks Hakata dialect. She calls Muromi 'Onee-tan." She loves dolphins very much.
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Muromi-san
Supporting (Role) TV
![Nonaka, Ai](https://img.flawlessfiles.com/_r/100x100/100/df/22/df224aacf0a42e95b951f34dcc0ac56e/df224aacf0a42e95b951f34dcc0ac56e.jpg)