The Aoi Aoi no Mi (果物果物) is a Logia-type Devil Fruit, in which the user can control and produce Blue Fire. Aoi is the Japanese word for blue. “” In both Viz Manga, and the FUNimation dub, it is called the Blue-Blue Fruit.
The blue blue fruit has a number of usages; the first is to create blue fire. This fire is unnaturally cold, able to freeze things on contact. A fun fact is this fruit can neutralize any form of regular heat. Such as magma, fire, Ect. Being the natural enemy of the Magu Magu no mi and the Mera Mera no Mi. This fruit also has healing capabilities. Along with it being super cold, apon usage and intense training and thinking. One may learn how to control the temperature to a degree. Stating this fire can be hot enough to burn things, or cold enough freeze things, (LITTERALY creating ice)