Mafuyu Munetani

She is a Captain of the Blue Mermaids Independence-class Littoral Combat Ship called Benten, the daughter of [Mayuki Munetani](https://anilist.co/character/203449/Mayuki-Munetani), the younger sister of [Mashimo Munetani](https://anilist.co/character/203447/Mashimo-Munetani) and the older sister of [Mashiro Munetani](https://anilist.co/character/89350/Mashiro-Munetani).

(Source: HaiFuri Wikia)