The singing voices in KPop Demon Hunters for the main characters of the girl group HUNTR/X are:
- Rumi (lead vocalist and leader) is sung by EJAE, a Korean-American vocal producer and arranger who also wrote several of the film's songs.
- Mira (visual and main dancer) is sung by Audrey Nuna, an R&B singer and rapper.
- Zoey (main rapper and maknae) is sung by Rei Ami.
For the demon boy band Saja Boys:
- Jinu, their leader, is sung by Andrew Choi.
Additionally, the character Celine, a former demon hunter and K-pop idol, is voiced in singing by Lea Salonga. These singers bring the K-pop group and demon hunter characters to life with their singing performances in the film.
