Tomoko Hiraga is a female supporting character in High School Fleet, a Blue Mermaid officer who approaches the crew of Harekaze to deliver supplies and investigate the truth behind the ship’s alleged mutiny.
Tomoko Hiraga serves in the Blue Mermaid Safety Supervisory Office, Intelligence Investigation Unit as a Second Inspector.
Her position is listed as department chief.
She is a direct subordinate of Mashimo Munetani, the top authority of the Blue Mermaid Japan branch and head of the government’s Maritime Safety Administration.
Because Mashimo mainly works on land, Tomoko often handles field intelligence and on-site information gathering in her place.
Her voice actor is Mayuka Nomura.
In Episode 4, Tomoko makes contact with Harekaze under orders from Mashimo Munetani.
Her mission is to determine whether reports claiming that Harekaze had mutinied were true.
These reports were being spread by bureaucrats within the Maritime Safety Administration.
They appear to be separate from Mashimo’s Safety Supervisory Office and are repeatedly shown in conflict with Mayuki Munetani.
When Tomoko first approaches Harekaze, she does so by temporarily detaining the crew.
After hearing their side of the story, she confirms that the mutiny accusation is false.
Once the truth becomes clear, she quickly arranges for a supply ship and a special-purpose vessel to rush to Harekaze.
They provide the ship with ammunition and daily necessities.
During Operation Persius, she boards Mikura together with Noriko Fukuuchi.
Tomoko is highly skilled in marine sports in general.
She is especially accomplished as a skipper.
During her student years, she ranked among the top competitors in the International Skipper Race, S-1 category.
This background marks her as one of the more athletically capable support officers in the series.
Tomoko is portrayed as consistently gentle and mild-mannered.
She remains calm even in awkward or absurd situations.
A story from six years earlier, during her time as a maritime student, highlights this side of her.
When Mafuyu Munetani, who already wore her signature cape at the time, groped her chest under the excuse of “putting fighting spirit into her,” Tomoko did not protest.
She also defended Mafuyu when Mafuyu’s unusual behavior and personal preferences were criticized.
When Mafuyu was banned from entering the dining facility, Tomoko continued to stand up for her until the ban was lifted.
In the manga version, specifically Volume 2, Chapter 14, which takes place shortly after Episode 4, Tomoko’s bust becomes a topic of conversation aboard Harekaze.
This detail is played for light comedy and adds to her memorable presence.
Gender: Female
Affiliation: Blue Mermaid Safety Supervisory Office, Intelligence Investigation Unit
Rank: Second Inspector
Position: Department Chief
Voice Actor: Mayuka Nomura
💬 Community Discussion
Talk about this anime with people who actually care.