The personification of the third of the Hiburi-class coastal defense ships in Kantai Collection. Her name is the one applied to the island of Singapore during the Japanese occupation in WWII.
The Hiburi-class wear a white short-sleeved sailor dress with blue collar and accents, along with a white sailor hat, short, white socks, and uwabaki. Their rigging is carried via a shoulder strap, and depth charges are strapped to their thighs.
Shounan herself has short black hair with twintails and purple eyes.