SAI ²Rium

 (サイリウム) is a nine-member Japanese idol group formed on July 22, 2022.

They made their stage debut on August 20, 2022.

Members

 * Koshiba Nemu (小柴ねむ; )
 * Asahina Kaho (朝比奈花帆; )
 * Toa Yui (永愛ゆい; )
 * Mashiro Ria (真白梨愛; )
 * Himemiya Marin (姫宮海夢; )
 * Amatsuka Sana (天使さな; )
 * Nanase Ran (七瀬らん; )
 * Uruu Mako (麗羽まこ; )
 * Rorii Miruki (炉莉ヰみるき; )