Purry is a character that appears within The Minish Cap. Purry is a gray cat that resides in Hyrule Town and can be seen sitting on top of the bridge near the southern entrance of town. If Link tries to talk to Purry while Link is in his regular form, Purry will just Meooow at him. Even when Link is in Minish form, Purry will continue to use cat language.
The only time that Purry will speak with Link is when it wants to fuse Kinstones. Link is able to fuse Green Kinstones at various points in the game. As it is a Green Kinstone fusion, it is not set to a specific treasure chest, but instead, one of the many possible treasure chests. There is one random Red Kinstone within the game that opens up a tree in North Hyrule Field leading to a Piece of Heart, as well as a random Blue Kinstone that opens up a Fairy Fountain in North Hyrule Field. Purry is one of the many characters in which Link can make this Kinstone fusion with.
Purry is the one cat found within the game that will not harm Link at all. The other cats will attack Link while he is in Minish form.