This legendary armor is located in Amagasaki Castle, which is northwest of Osaka. The armor chest is on the top floor of the highest tower. You will find this tower in the northeastern corner of the middle section of the castle (cross the water twice). You must defeat five Samurai Daisho to unlock the legendary chest.

The best build for Naoe in Assassin's Creed Shadows utilizes the Kusarigama and Assassin skills, and has something for every occasion.

Also, she has a lot of cool weapons! The tanto is a blur of elegant steel, but the kusarigama is a complex chain whip that gives you options for battlefield control. She also gets the series' staple "Eagle Vision", which pairs nicely with her ability to perform numerous kinds of assassinations that are specific to her.