Kouko Nosa

, also known as Coco, is one of the four tritagonists (alongside Mei Irizaki, Shima Tateishi and Rin Shiretoko) of the 2015 manga series High School Fleet and its 2016 anime adaptation, as well as the 2020 movie High School Fleet Movie.
Coco serves as the secretary of the Harekaze crew to both Mashiro Munetani and Akeno Misaki. Outside of battle, Coco is known to spout "theories" in the most random ways imaginable. Her imagination always goes run wild and mostly out of hand, and has a hard time putting boundaries between fiction and non-fiction.
In battle, however, she is a skilled information gatherer to the Harekaze regarding their opponents, where she relays it to the ship's bridge crew, and use it to their own advantage.
Along with one of the Harekaze crew members to be falsely accused of mutiny by Kaoru Furushou, who was under control by RATt Virus, Coco and the rest would go into hiding across the Pacific.
Coco is voiced by Yuuko Kurose.
==Appearance==
While she is frequently seen in her school uniform, Coco is virtually always seen wearing her white hat and sweater, similar to how Mei Irizaki is frequently seen wearing her tiger hoodie. Her dark hair is braided at the back of her ears. Near the ends of these braids are a pair of pink ribbons.
==Personality==
Kouko is more fascinated by the world of fiction than by the world of reality, which is why she frequently acts out her fantasies. This often results her in her having hard time putting a boundary between fantasy and reality.
She also enjoys immersing herself in character, particularly in Japanese gangster films. Wilhelmina Braunschweig Ingenohl Friedeburg shares such a common interest with her that the two become friends during the course of the story.
==Background==
Coco is the Harekaze's secretary and is third-in-command behind Akeno and Mashiro. She also gathers information about the Harekaze's circumstances, such as its opponent's features and specifications, the area it is fighting in, and the Harekaze's damage control.
Following a mutual interest in Japanese gangster flicks, she became friends with Wilhelmina. Wilhelmina rejoined her students and departed for Seeadler Harbor for resupply after the Admiral Graf Spee was freed from the virus. While initially devastated by this, Coco said her goodbyes to Wilhelmina, knowing that the two would meet up again on a vacation.
During Operation: Perseus, both Coco and Wilhelmina didn't have to wait long to see one other. The Graf Spee took part in the mission to stop the Musashi and save its brainwashed crew members.
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