Yumeiro Sinfonia

 (ゆめいろシンフォニア; formerly 夢彩シンフォニア), formerly known as ICR Kenshuusei (ICR研究生), is an idol group formed in May 2021.

They were formed as ICR Kenshuusei (ICR研究生) in May 2021 and held their debut live on June 6, 2021.

They rebranded to Yumeiro Kenshuusei (夢彩シンフォニア) on September 26, 2021 and held their debut live on October 3, 2021.

Current Members

 * Saionji Hinata (西園寺ひなた; ) (Founding Member)
 * Himari Kiho (向日葵きほ; ) (Joined June 6, 2021)
 * Yuki Miya (夕稀みや; ) (Joined September 2021)
 * Seina Maria (星那まりあ; ) (Joined October 1, 2022)
 * Amane Tsuki (天音つき; ) (Joined November 7, 2022)

Former Members

 * Utsuki Reni (兎月れに) (Founding Member; left July 2021)
 * Shijou Nia (獅城にあ) (Founding Member; left August 5, 2021)
 * Suzumiya Asuna (涼宮あすな; ) (Founding Member; left December 30, 2021)