It resembles the shoes of the character Squid Girl from the anime Shinryaku! Ika Musume, simply known as Squid Girl outside of Japan. It, along with its matching SQUID GIRL Tunic and Hat, has its own brand in the game (SQUID GIRL). Despite its name, it is a unisex item. The ring around the top of the shoe changes color depending on the Inkling's ink color.
The creator of Shinryaku! Ika Musume has drawn crossover fanart for Splatoon featuring characters from his own series. These can be viewed on his twitter page, accessible here.
Names in Other Languages
|Japanese||イカ娘シューズ||Squid Girl Shoes|