Prism Mates

In 2011, Mia Kusakabe, Reina Kubo and Karin Takahashi were in a pre-debut trainee group called Prism Mates, where they would participate in the "Pretty Rhythm Studio" live-action segments at the end of each episode in Pretty Rhythm: Aurora Dream. The segments followed them training in dance, singing, and fashion sense for their debut, much like the main characters in the show. The members were all students from Avex Dance Master.In 2012, Kusakabe, Kubo, and Takahashi debuted under the name Priz…