Aimer (pronounced "Eh-Meh") is a Japanese singer-songwriter renowned for her distinctive, husky vocal tone, a result of vocal cord damage from overuse in her youth. This unique voice, often described as both haunting and soothing, became her signature.

Debuting in 2011 with the single "Rokutousei no Yoru," she quickly gained prominence through her contributions to major anime soundtracks. Her career was catapulted by the hit "Brave Shine" (Fate/stay night: Unlimited Blade Works) and the massively popular "Kataomoi" (Your Lie in April). She is celebrated for her prolific output and collaborations with renowned composers like Yuki Kajiura and Hiroyuki Sawano. Despite her public persona, she maintains an enigmatic presence, rarely showing her face and letting her music speak for itself. In 2022, she married musician Masahiro Tobinai of the band ONE OK ROCK, and she continues to be a dominant and respected voice in the Japanese music industry.