Shimakaze Kainami

Shimakaze Kainami (海波島風, Kainami Shimakaze) is a RIJN experimental destroyer, meant to be the prototype for a new "Type C" class of destroyer. Original plans for Shimakaze date back to at least the late 1990s, and plans for the new Type C class involved 16 new ships. However, after the construction of the prototype, Shimakaze, the RIJN decided it wasn't worth it, and abandoned the project.
Due to this, Shimakaze is a classless shipgirl, with no siblings or class type until 2015, when the RIJN created the Shimakaze-class to make Shimakaze feel better. 
Her purpose and reason to be built is to ensure the current Commander is just as loyal to the shipgirls as the shipgirls are too him. She is commonly referred to as the "base slut", known for having an extreme attraction to the current Commander. This is also the reason behind for her manner of dress.
Her designer is Daichi Kainami. Kainami developed a method for a new kind of faster shipgirl in 1997. This shipgirl would be considered a cross between destroyer and light battlecruiser. He also developed the prototype for the Rensouhou-chan, Shimakaze's three gun turrets, who are alive and can act independently. Shimakaze trains them.
Shimakaze is widely regarded for being fast, in fact, she is the fastest ship in the RIJN, and the second fastest shipgirl in the world, right behind Le Fantastique, a French shipgirl. 
Shimakaze is also equipped with a Type 13 air radar, a Type 93 passive sonar, quintuple oxygen torpedo mounts, and an optional "Rooster" duple gun mount. This ranks her relatively high as far as destroyers go, and is usually positioned as lead scout in any squadron she's in.
She has been censured multiple times by the Naval Ministry for her manner of dress. However, the RIJN has contested every censure, and has kept Shimakaze on the registrar by giving her an optional winter uniform that was much less revealing. She usually never wears it.