Rumi is secretly half demon in KPop Demon Hunters.
Rumi is the leader of HUNTR/X, but she hides a heritage that makes her different from the other hunters. Demonic patterns gradually appear across her skin, and she worries that Mira and Zoey will reject her if they learn the truth.
Her secret is central to the film’s theme of identity. Rumi initially treats the marks as something that must be erased, hoping the group’s music and the Golden Honmoon will remove them. The story eventually connects her self-acceptance with her ability to confront the supernatural threat.
Rumi’s half-demon identity is not the same as being one of the Saja Boys. The Saja Boys are demons serving Gwi-Ma, while Rumi is a hunter who has inherited demonic traits and remains committed to protecting humanity.