Iris (stylized as i☆Ris) is a Japanese idol girl group, formed in 2012 by Avex and 81 Produce. The group currently consists of five members: Saki Yamakita, Yū Serizawa, Himika Akaneya, Yuki Wakai, and Miyu Kubota. The leader is Saki Yamakita. In addition to their music career, all members are also active as voice actresses, most notably in the video game and anime series PriPara. The group has also performed themes for the anime series Wise Man's Grandchild, Magical Girl Site, Magical Sempai, and Twin Star Exorcists.
Source: “Azuki Shibuya”, English Wikipedia (CC BY-SA 4.0), excerpt