Mystery Saja (Korean: 미스터리 사자 RR: Miseuteori Saja) is a backup vocalist of Saja Boys and serves as a minor antagonist in the film KPop Demon Hunters. A demon in disguise, he poses as a K-pop idol in order to steal fans from HUNTR/X. He also briefly appears as a love interest for Zoey. Mystery is voiced by Alan Lee, with Kevin Woo providing his singing voice.