Oh, and also many of the character designs are based on anime characters. For instance The IJN destroyers Ikazuchi and Inazuma are clearly based on Ram and Rem from Re:zero. The USS light cruiser Juneau is based on Ilya Von Eisebern from the Fate series. USS Yorktown looks an awful lot like Ilya's mother. HMS Renown looks an awful like Saber. HMS Hermes is a walking, talking Yugioh reference. USS Phoenix references G-Gundam. HMS Glowworm resembles Cirno fro the Touhou Project. USS Pennsylvania and Arizona are both based on classic pin-up girls. The South Dakota class are all Native American themed. A large portion of the Royal Navy are maids. There's tsunderes, yanderes, codependants, hikkomoris, school teachers, nuns, mikos, fox girls, cat girls, dog girls, bunny girls, a squirrel girl, onis, idols, a witch, a Frankenstein's monster, vampires, ninjas, an elf, a crusader, a courtesan, a baseball player, a dominatrix... The list goes on.