|Happy Cat T-Shirt|
|Rōmaji||Happī Kyatto Tīshatsu|
A mauve T-shirt with a neon yellow cat on it. Next to the cat are three small hearts, while below it is writing. Over this is a powder blue line print vest with a gold button. A gold bracelet and one covered in mauve stones is included.
Originally, Aira had this Prism Stone with a set she picked for the Tiara Cup finals as emergency back-up. But when a group of envious girls stole their Prism Stones, she claimed she had more and gave them to Rizumu.
In the anime, the design is partially simplified on the shirt.