The Bond Between Stars - S3.E49

As Luminas work to improve themselves before the festival, Kaede approaches Yurika about entering the festival as Tristar. While initially believing it to be impossible, Yurika eventually realises from spending time with Powa Powa Puririn that she wants to reform Tristar too. After being approached by Kaede and Yurika, Mizuki feels the same way and gets Orihime's okay to reform Tristar.