Aimer is a Japanese pop singer and lyricist signed to Sacra Music and managed by Agehasprings. Her stage name comes from the French verb aimer 'to love'. Aimer uses the name aimerrhythm for lyrics credits.
Debuting in 2011, she has released seven studio albums, all of which made it into the top 20 of the Oricon Albums Chart, with fourth album Daydream being certified Gold by the Recording Industry Association of Japan. Her 2021 song "Zankyōsanka" became her first song to reach the top of the Japan Hot 100 chart, selling 87,649 downloads in its first week. It also charted at number 37 on the Billboard Global 200, marking her first appearance on the chart.