Link is able to fuse a Green Kinstone with Chai 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.
Throughout the game, Link can speak with Chai, and she is constantly asking to raise your milk for a toast. Chai will ask some meaningless questions, such as what she should have for dinner.
- Her name Chai is likely a reference to Tea, as Tea is referred to as Chai in a number of languages.
- In the Japanese version of the game, her name is Moka, which is likely a reference to mocha, a combination of chocolate and coffee.