Mashimo Munetani

is a major character in the 2015 manga High School Fleet and its 2016 anime adaptation, as well as the 2020 movie High School Fleet Movie. She is a member of the Munetani Family, the oldest daughter of Mayuki Munetani, and the oldest sister of Mafuyu Munetani and Mashiro Munetani.
An alumna in Yokosuka Girls' Marine High School and one of Kaoru Furushou's old friends, Mashimo is one of the members of the maritime peacekeeping organisation Blue Mermaids, following her mother's footsteps. She works as the head of the Safety Oversight Office, which is one of the divisions of the Maritime Support Safety Department.
Mashimo is voiced by , who voiced Nagisa Furukawa in Clannad.
==Personality==
Mashimo gets her sass and respected demeanour from her mother, Mayuki, a well-known Blue Mermaid. She would go to great lengths to do the right thing, even if her bosses in the Maritime Support Safety Department disagreed.
Despite her generally pleasant demeanour, she may be rather frightening at times. Mashimo is the only one who can keep her sister Mafuyu's impulsive instincts under control. When angered, she won't hesitate to take harsh actions, such as letting Mafuyu go wild against armed pirates in the movie.
==History==
===Past===
Mashimo Munetani, like every other Munetani woman, followed in her mother's footsteps to become a Blue Mermaid. She enrolled at Yokosuka Girls' Marine High School and became friends with Kaoru Furushou, an upperclassman.
She later becomes a member of the Blue Mermaids, whilst her friend Furushou becomes an instructor in Yokosuka.
===Harekaze's "Mutiny"===
After graduation, she became the director of the Safety Oversight Office. Mashimo initiated an inquiry after learning of the Harekaze's "mutiny" and cleared the destroyer's crew's identity. Further study revealed it is caused by Totalitarian Disease, officially known as the RATt Virus, which was to blame for the alleged "mutinies" aboard the Yokosuka Girls' ships.
===Operation: Perseus===
The Blue Mermaids began to fight back against the sickness after receiving Minami Kaburagi's vaccination. Operation: Perseus, a counteroffensive, was Mashimo's last-ditch effort against the five remaining infected ships including Hiei, Sarushima, Graf Spee, Musashi, and Harekaze, to a lesser extent. Despite considerable damage to the Blue Mermaids during the combat against the Musashi, the mission was finally successful.
===Anti-Piracy Operation===
Mashimo commanded a fleet of Musashi student ships in an anti-piracy mission to prevent a highly equipped mobile seafort from reaching Tokyo Bay and wreaking a genocidal plot to attack the maritime cities.
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