Yayoi Yamu

 (夜宵やむ) is a Japanese idol, a founding member of AdamLilith and HEROINES, and a former founding member of Higeki no Heroine Syndrome.

She graduated from Higeki no Heroine Syndrome and HEROINES on April 23, 2021, where Higeki no Heroine Syndrome disbanded.

After the group's disbandment, she stayed in the agency, promoting solo.

On March 5, 2022, she was revealed as the first member of HEROINES' upcoming Idol Project, KODO (鼓動) while announcing the start of member auditions.

On October 3, 2022, she was officially revealed as the first member of AdamLilith, and thus rejoining HEROINES.

Singles

 * Silent Cry / REVENGER

Video Releases

 * mercy killing

Albums

 * Ubiquity ~Konosaki mo Issho ni Ayunde Ikou ne~

Trivia

 * She shares a Twitter and YouTube channel with fellow member Kagono Mea, both accounts are named Yoru Mea Rengou (夜めあ連合; Nightmea Union).
 * As of August 2021, their YouTube channel has over 39,500 subscribers, and their Twitter has over 13,400 followers.